Question

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a) - x + 9x - 10 = 12

b) - x - 4x - 4 + 7 = x + 3

Answer 1

a) -x + 9x - 10 = 12 -x + 9x = 12 + 10 8x = 22 x = 22/8 x = 11/4 b) -x - 4x - 4 + 7 = x + 3 -x - 4x - x = 3 + 4 - 7 -6x = 0 (-1) 6x = 0 x = 0/6 x = 0

Answer 2

a) - x + 9x - 10 = 12
- x + 9x  = 12 + 10
8x = 22
x= 22 : 8
x = 2 6/8
x= 2 3/4
x = 2,75

b) - x - 4x - 4 + 7 = x + 3
- x - 4x - 4 + 7 = x + 3
- 5x + 3 = x + 3
- 5x - x = 3 - 3
- 6x = 0
x = 0 : (-6)
x = 0