How do you solve this problem:
-(-2x)-(-5x-1)=5 three-fourths x +11
Can anyone show me step by step on how to solve this problem.....I would really appreciate
2007-05-10 15:59:11 · 8 answers · asked by nancy 1 in Science & Mathematics ➔ Mathematics
Alright. Let's start with the left-hand side because it looks nastier.
-(-2x) is the same as 2x (two negatives = positive)
-(-5x-1) is the same as 5x+1 for the same reason.
Now you have 2x+5x+1. That simplifies to 7x+1.
Now for the right-hand side.
5*(.75x +11) is the same as 5*.75x + 5*11 or (15/4)x +55.
Putting it back together, we have this equation:
7x+1=(15/4)x+55
Now:
7x=(15/4)x+54 (subtract one from both sides)
(13/4)x=54 (subtract (15/4)x from both sides)
x= 54/(13/4) (divide both sides by 13/4)
There you are!
2007-05-10 16:08:15 · answer #1 · answered by Dark Knight 3 · 0⤊ 0⤋
Is the second hal of the equation 5 3/4x + 11?
1. Remember the rule, subtracting a negative is like adding a positive. so, 2x+5x+1=5 3/4x +11
2. combine like terms on the left, and change the mixed number on the right to an improper fraction, 7x+1=23/4x + 11
3. subtract 1 from both sides and multiply both sides by 4 to get rid of fraction, 28x=23x + 40
4. subtract 23x from both sides , 5x=40
5. divide both sides by 5, x=8
2007-05-10 23:15:36 · answer #2 · answered by mago 5 · 0⤊ 0⤋
5 three fourth is (23/4)x
therefore from the given eq
2x+5x+1=23/4x+11
multiplying by 4 throughout
we get
8x+20x+4=23x+44
therefore
28x-23x=44-4
5x=40
therefore x=8
2007-05-10 23:15:44 · answer #3 · answered by SHIVA 1 · 0⤊ 0⤋
2x + 5x + 1 = (23/4 ).x + 11
28x + 4 = 23x + 44
5x = 40
x = 8
2007-05-11 14:26:14 · answer #4 · answered by Como 7 · 0⤊ 0⤋
-(-2x)-(-5x-1)=5 three-fourths x +11
=2x+5x+1=5 three fourths x +11
7x+1=5 three fourths x +11
__-1________________-1____
7x= 5 three fourths x +10
- three-fourths x +10 - 5 three-fourths x +10
1 one fourthx=10
1 one fourthx divided by 1 one fourth x to both sides
X=8
2007-05-10 23:09:34 · answer #5 · answered by stormtrooper180 3 · 0⤊ 0⤋
-(-2x)-(-5x-1)=(5 3/4) x +11
2x+5x+1= 23x/4+11
7x = 23x/4+10
28x = 23x +40
5x=40
x=8
2007-05-10 23:07:28 · answer #6 · answered by jaybee 4 · 0⤊ 0⤋
-(-2x)=2x
-(-5x-1)=5x+1
LHS=2x+5x+1=7x+1
RHS=(23/4)x+11
7x-(23/4)x=11-1
(5/4)x=10
x=(10*4)/5=8
x=8
2007-05-10 23:12:24 · answer #7 · answered by Anonymous · 0⤊ 0⤋
-(-2X)-(-5X-1)=5.75X+11
2X+5X+1=5.75X+11
7X+1=5.75X+11
-1 -1
7X=5.75X+10
-5.75X
1.25X=10
_________
1.25 1.25
X=8
2007-05-10 23:15:33 · answer #8 · answered by Shar D 2 · 0⤊ 0⤋