is this 4 or -4?
2007-04-08 02:18:32 · 11 answers · asked by D 1 in Science & Mathematics ➔ Mathematics
8x - 4 = 7x
8x -4 - 7x = 7x - 7x
x - 4 = 0
x - 4 + 4 = 0 + 4
x = 4
- - - - - - -s-
2007-04-08 03:49:22 · answer #1 · answered by SAMUEL D 7 · 0⤊ 0⤋
x=4
2016-05-19 23:36:11 · answer #2 · answered by ? 3 · 0⤊ 0⤋
8x - 4 = 7x
Take 7x to left and its sign changes from + to - and take -4 to right side of the equation. So its sign changes from - to +....
8x - 7x = +4
x = +4
2007-04-08 04:38:18 · answer #3 · answered by tigerknight80 2 · 0⤊ 0⤋
8x-4=7x
1) place the constant on one side and the variables on the other side of the equal sign.
8x-4=7x
-8x -8x
-4 = -x
2) the variable can never have a negative coefficient.
-4 = -x
(*-1) (*-1)
4 = x
3) Thus the answer is 4.
2007-04-08 02:27:34 · answer #4 · answered by Anonymous · 0⤊ 0⤋
8x-4=7x
8x-7x=4
x=4
2007-04-08 06:11:59 · answer #5 · answered by Anonymous · 0⤊ 0⤋
8x - 4 = 7x
8x - (7x) - 4 + (4) = 7x - (7x) + (4)
x = 4
2007-04-08 02:26:34 · answer #6 · answered by michaell 6 · 0⤊ 0⤋
add 4 to both sides and subtract 7x form both sides
x=4
2007-04-08 02:21:37 · answer #7 · answered by Anonymous · 1⤊ 0⤋
8x-7x-4=0
8x-7x=4
x=4
4
2007-04-08 02:21:46 · answer #8 · answered by Jami 3 · 0⤊ 0⤋
4
Solution:
8x-4 = 7x
-4 = 7x-8x
-4 = -x
4 = x
Final answer: x = 4
TC! GOD BLESS!
2007-04-09 04:13:42 · answer #9 · answered by Yonamaria 2 · 0⤊ 0⤋
8x-4=7x
8x-7x=4
x=4
Ans. is +4
2007-04-08 02:22:10 · answer #10 · answered by Raj 2 · 0⤊ 0⤋