Question

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0,75x=12

2x-4=8
3(2x-1)=5x-9
-4(5x+2)=2-10x
6x+2=2(x-3)
-4(7-5x)=12
5x-3=7+4x
2x-4(x-3)=2

Answer 1

A) 0,75x = 12 / : 0,75
x = 16

b) 2x-4 = 8 
2x = 12 / :2
x = 6

c)3(2x - 1) = 5x - 9
6x - 3 = 5x - 9
6x - 5x = -9 + 3 
x = -6

d)-4(5x + 2) = 2 - 10x
-20x - 8 = 2 - 10x
-20x + 10x = 2 + 8
-10x = 10 / : (-10)
x = -1

e) 6x + 2 = 2(x-3)
6x + 2 = 2x - 6
6x - 2x = -6 -2
4x = -8 / : 4
x = -2

f) -4(7 - 5x) = 12
-28 + 20x = 12
20x = 12 +28
20x = 40 / : 20
x = 2

g) 5x - 3 = 7 + 4x
5x - 4x = 7 +3
x = 10

h)  2x - 4(x - 3) = 2
2x - 4x + 12 = 2
2x - 4x = 2 - 12
-2x = -10 / : (-2)
x = 5