Question

3(x-1)-4(x-2)=0


x+7=21x-43

Answer 1

3(x-1) - 4(x-2) = 0
3x - 3 - 4x + 8 = 0
3x - 4x -3 + 8 = 0
-x + 5 = 0
-x = -5
x = 5

x + 7 = 21x - 43
x - 21x = -43 - 7
-20x = -50
x = 50/20
x = 5/2