Question

x +15=-4x
x-12= 4 x
2 x -7= 8
4x-1=10
4 x +5=7

Answer 1

A) x + 15 = - 4x
x + 4x = 15
5x = 15
x = 15/5
x = 3

B) x - 12 = 4x
x - 4x = 12
- 3x = 12 (-1)
3x = - 12
x = - 12/3
x = - 4

C) 2x - 7 = 8
2x = 8 + 7
2x = 15
x = 15/2


D) 4x-1=10
4x = 10 + 1
4x = 11
x = 11/4

E) 4 x +5=7
4x = 7 - 5
4x = 2
x = 2/4(÷2)
x = 1/2