maths equation
2006-10-09 05:39:22 · 18 answers · asked by kylepato 1 in Education & Reference ➔ Homework Help
combine like terms
so it would be: 5x-2x=11+7
which reduces to 3x=18
divide each side by 3 to isolate x
so the answer is x=6
2006-10-09 05:43:36 · answer #1 · answered by thatshowiroll 3 · 0⤊ 0⤋
5x - 2x = 3x and 11 - 7 = 4 so the expression is same as 3x + 4. i assume you decide on the answer of 5x - 7 - 2x + 11 = 0 (nevertheless you probably did no longer say that...). 3x + 4 = 0 subtract 4 from the two factors and then divide the two factors by 3: x = -4/3
2016-10-16 00:16:33 · answer #2 · answered by ? 4 · 0⤊ 0⤋
x=6
2006-10-09 05:51:41 · answer #3 · answered by Anonymous · 0⤊ 0⤋
x=6
2006-10-09 05:48:08 · answer #4 · answered by Anonymous · 0⤊ 0⤋
x=6
2006-10-09 05:46:53 · answer #5 · answered by Anonymous · 0⤊ 0⤋
x=6
2006-10-09 05:43:41 · answer #6 · answered by gymnastgirly622 2 · 0⤊ 0⤋
5x-7+7= 2x+11+7; 5x-2x= 18; 3x= 18; x= 18/3; x= 6
2006-10-09 05:42:50 · answer #7 · answered by Anonymous · 0⤊ 0⤋
You must think of it backwards: 2 somethings + 11=7. This means that the 2 somethings must be minus numbers. Once you have worked this out, think about this: 2x+7=5x. As you already know the total of 2x, add 7 to them, and then divide it by 5 and, there you go, you have your answer!
2006-10-09 05:45:18 · answer #8 · answered by Mimkat 1 · 0⤊ 0⤋
5x-7=2x+11
+7
5x=2x+18
-2x
3x=18
divide by 3
x = 6
2006-10-09 05:45:28 · answer #9 · answered by Anonymous · 0⤊ 0⤋
5x - 7 = 2x + 11
(move the 2x to the opposite side, to get all the x's on one side. then move the 7 to the other side, by adding it to both sides)
5x - 2x = 7+11
(calculate each step to get the answer)
5x - 2x=3x
7+11=18
3x=18
x=6
2006-10-09 05:46:06 · answer #10 · answered by Anonymous · 0⤊ 0⤋
5x - 7 = 2x + 11
5x = 2x + 18
3x = 18
x = 6
Substituting back in to prove:
(5 * 6) - 7 = (2 * 6) + 11
30 - 7 = 12 + 11
23 = 23
True!
So, x = 6 is the solution
2006-10-09 05:43:29 · answer #11 · answered by Anonymous · 0⤊ 0⤋