Question

B) 10x-8 = 8x
e) 2x+3 = x-9
h) 5x+8 = 7x-32

Answer 1

b) x = 4

e) x = -12

h) x = 20

Explanation:

b) 10x - 8 = 8x

10x - 8 + 8 = 8x + 8

10x = 8x + 8

10x - 8x = 8x + 8 - 8x

2x = 8

`(2x)/(2) = (8)/(2)`

x = 4

e) 2x +3 = x - 9

2x +3 -3 = x - 9 -3

2x = x - 12

2x -x = x -12 -x

x = -12

h) 5x + 8 = 7x - 32

5x + 8 - 8 = 7x -32 -8

5x = 7x - 40

5x - 7x = 7x - 40 -7x

-2x = -40

`(-2x)/(-2) = (-40)/(-2)`

x = 20