1/2x+1+3/8x=7?

1/2x+1+3/8x=7
12/8x+1=7
-1 from both sides
12/8x=6
*8 both sides
12x=48
divide both sides by 12
x=4

OR

.5x+1+.375x=7
-1 from both sides
.5x+.375x=6
.875x=6
divide both sides by .875
x=6.8571438571428571429
i think.

2007-12-02 13:32:01 · answer #1 · answered by On Earth 3 · 2⤊ 3⤋

1/2 + 3/8 = 7/8 because 1/2 is 4/8 and 4/8 plus 3/8 equals 7/8

7/8x + 1 = 7
subtract one to the other side

7/8x = 6
divide 7/8

x = 6 / 7/8
6 divided by 7/8 is the same thing as 6 multiply by 8/7

x = 6 X 8/7
multiply

x = 48/7

2007-12-02 21:58:22 · answer #2 · answered by Seanspace 1 · 1⤊ 1⤋

These types of problems are usually solved by getting the variable expressions on one side and getting the constants on the other:
Subtract 1 from each side: 1/2x + 3/8x = 6
From here, you can find the lowest common denominator for the coefficients of the variable x, which would be 8 ... then multiply each term on both sides by that number: 4x + 3x = 48.
(8 x 1/2x is 4x ... and ... 8 x 3/8x is 3x ... and ... 6 x 8 is 48)
Simplify: 7x = 48.
Divide both sides by 7: x = 48/7 (or x = 6 6/7)

2007-12-02 21:40:56 · answer #3 · answered by Glen L 1 · 3⤊ 1⤋

1/2x+1+3/8x=7
1/2x+3/8x= -1+7
7/8x=6
x=6 * 8/7
x= 48/7

1. Multiply both sides by 8
2. Combine like x terms
3. Subtract 8 from both sides
4. Divide both sides by 7

2007-12-02 21:31:41 · answer #4 · answered by Kady 4 · 5⤊ 1⤋

If your question like this
(1/2)x + 1 + (3/8)x = 7
(8/2)x + 8 +3x = 7
4x + 3x = 7 - 8
7x = -1
x = - 1/7
x=0.1429
If your question like this
(1/2x+1) + (3/8x) = 7
2x + 1 + 8x / 3 = 1/7
6x/3+8x/3=1/7-1
14x/3 =-6/7
14x = -18/7
x = -9 / 49
x = 0.1837

2007-12-05 01:18:36 · answer #5 · answered by Rayan Ghazi Ahmed 4 · 0⤊ 0⤋

First, I assumed your problem is really:
(1/2)x + 1 + (3/8)x = 7
[This will give you a huge difference in solutions from the problem you posted.]

Group your like terms on one side of the equation.

1/2 (x) + 3/8 (x) = 7 - 1

Combine and simplify each side.
Solve for x.
= = = == =
Interesting...after I posted this answer, there were 6 WRONG answers and 4 right answers.

= = = = = = =
Of course, this assumes that we all interpeted the question correctly (which was different than how it was posted!!!)

To clarify, this is how the question was posted (brackets added for clarity):
1/(2x)+1+3/(8x)=7

This is how we ALL solved it:
(1/2)x+1+(3/8)x=7

2007-12-02 21:34:32 · answer #6 · answered by dave13 6 · 2⤊ 2⤋

1. Multiply both sides by 8
2. Combine like x terms
3. Subtract 8 from both sides
4. Divide both sides by 7

1/2x+1+3/8x=7
1. 4x+8+3x=56
2. 7x+8=56
3. 7x=48
4. x=48/7

2007-12-02 21:40:18 · answer #7 · answered by whocares8523 1 · 2⤊ 1⤋

1/2x + 1 + 3/8x = 7

1/2x + 3/8x = 7-1

1/2x+ 3/8x = 6
multiplying equation by 8
(x8) : 8*(1/2x) + 8*(3/8x) = 8*(6)

> 4x + 3x = 48

7x = 48

x=48/7

x=6/6/7

2007-12-02 21:39:20 · answer #8 · answered by kamleshgokool 2 · 1⤊ 1⤋

Multiply both sides by 8:
4x+8+3x=56
7x+8=56
7x=48/7 or 6 6/7

Lacy, Steve B, Darian Loves You, Miss Exxclusive, and J B all have the wrong answer!

2007-12-02 21:31:58 · answer #9 · answered by Anonymous · 9⤊ 1⤋

6.82

1/2x =.5x
3/8x = .38x

.5x+1+.38x=7 subtract 1 from both sides
.5x+.38x=6 Combine the like variables
.88x=6 divide both sides by .88
x=6.82

Now plug it in .5(6.82)+1+.38(6.82)=7 and see if it works

3.41+1+2.60=7
7=7

Yep it works

2007-12-02 21:30:37 · answer #10 · answered by Mickeytopdog 3 · 3⤊ 1⤋

16 answers