Please show the steps if you can. I've been working on this problem for the longest time and the value of x that i get is always uneven.
2006-10-15 16:26:53 · 16 answers · asked by RaphaelDeLaGhetto 2 in Science & Mathematics ➔ Mathematics
You need to isolate x -- it's not too hard to do with a problem like this. But, what the hey, I will show you how to do it:
First multiply out the 3(x+4) and then you can just combine like terms and isolate the x:
5x + 7 - 3x + 2 = 3(x + 4) + 4
5x + 7 - 3x + 2 = 3x + 12 + 4
2x + 9 = 3x + 16
Subtract 2x from both sides:
9 = x + 16
Subtract 16 from both sides:
-7 = x
Pretty easy when you take it step by step, right?
Good luck!
2006-10-15 16:28:17 · answer #1 · answered by djc 3 · 1⤊ 0⤋
5x+7-3x+2=3(x+4)+4 2x+9=3x+12+4 2x+9=3x+16 9=x+16 -7=x
2006-10-15 16:32:06 · answer #2 · answered by Josh C 2 · 0⤊ 0⤋
Start with distributive property.
5x+7-3x+2 = 3x+12+ 4 Now combine like terms
2x +9 = 3x+16 Subtract 2x from each side
9 = x + 16 Get the x by itself by subtracting 16 from each side
-7 = x
2006-10-15 16:31:39 · answer #3 · answered by PatsyBee 4 · 0⤊ 0⤋
5x + 7 - 3x + 2 = 3(x + 4) + 4
2x + 9 = 3x + 12 + 4
2x + 9 = 3x + 16
9 = x + 16
x = -7
2006-10-15 17:07:52 · answer #4 · answered by girl. 3 · 0⤊ 0⤋
5x+7-3x+2=3(x+4)+4
5x + 7 - 3x + 2 = 3x + 12 + 4
2x + 9 = 3x + 16
3x - 2x = 9 - 16
x = -7
2006-10-15 16:36:49 · answer #5 · answered by MSC 5 · 0⤊ 0⤋
(1) 5x + 7 - 3x + 2 = 3(x+4) +4
(2) (5-3)x + (7+2) = 3x + 12 +4
(3) 2x + 9 = 3x +16
(4) (2x+9) - 2x = (3x+16) - 2x
(5) 9 = x + 16
(6) x = -7
Easy algebra.
2006-10-15 16:33:36 · answer #6 · answered by selfwarmingsocks 2 · 0⤊ 0⤋
Let's walk thru this together by first arranging the left side to put the x's together, and on the right side to get x out of the quotes:
5x - 3x +2+7 = 3x + 12+4
2x +9 = 3x +16
Now get the 2x from left side to the right side, and get the 16 from right to left:
9- 16 = 3x - 2x
Then you get x = -7
Hope this helps.
2006-10-15 16:31:20 · answer #7 · answered by boyjackie 2 · 0⤊ 0⤋
5x+7-3x+2=3(x+4)+4
distribute
5x+7-3x+2=3x+12+4
add
5x-3x+9=3x+16
add
2x+9=3x+16
subtract 9 from both sides
2x=3x+7
subtract -3x from both sides
-1x=7
now multiply by -1 or flip the signs of everything
Final Answer
1x=-7
or x=-7
both are the same thing!
2006-10-15 16:30:49 · answer #8 · answered by Anonymous · 0⤊ 0⤋
5x^2-4= 16 5x^2= 16 + 4 5x^2 = 20 X^2 = 20 : 5 x^2 = 4 x = 2 x^2-9x+20=0 (divide them) (x-4)(x-5) = 0 x-4 = 0 x=4 x-5 = 0 x= 5 9/10 = C/48 48.9 = c.10 432=10c c=43.2 3x^2+x-1=0 ( i don't get it) 9 - 3x < 4 (-x+1) 9-3x < -4x+4 9-4 <-4x + 3x 5<-x (finish it by urself, i'm in a hurry sorry) |9+a| > 4 a>4-9 a<-5 ??? |2-3x+9| < 10 x>-1 ?? i don't really get it.
2016-05-22 05:26:14 · answer #9 · answered by Anonymous · 0⤊ 0⤋
step 1: combine terms: 2x+9=3x+12+4
step 2: get x on one side: 9-12-4=3x-2x
x=-7
2006-10-15 16:36:52 · answer #10 · answered by Pablo M 2 · 0⤊ 0⤋