Question

a) 3.(x-2)=2x-4
b)3.(3x-1)=2.(3x+2)
c)3.(5-x)-3.(1-2x)=42
d)5.(x-3)-4.(x+2)=2+3.(1-2x)
me ajudem por favor

Answer 1

3(x - 2) = 2x - 4
3x - 6 = 2x - 4
3x - 2x = - 4 + 6
x = 2

3(3x - 1) = 2(3x + 2)
9x + 3 = 6x + 4
9x - 6x = 4 - 3
3x = 1
x = 1/3

3(5 - x) - 3(1 - 2x) = 42
15 - 3x - 3 + 6x = 42
3x = 42 - 15 + 3
3x = 30
x = 30/3
x = 10

5(x - 3) - 4(x + 2) = 2 + 3(1 - 2x)
5x - 15 - 4x - 8 = 2 + 3 - 6x
5x - 4x + 6x = 2 + 3 + 8 + 15
7x = 28
x = 28/7
x = 4