Question

7(0,4х-0,1)-5(0,4х-0,6)=-2х-0,5

Answer 1

7(0,4x-0,1)-5(0,4x-0,6)=-2x-0,5
2,8x-0,7-2x+3=-2x-0,5
2,8x-2x+2x=-0,5-3+0,7
2,8x=-2,8
x=-1