Question

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

Answer 1

2,8x-0.7=2x-3-2x-0.5
2.8x=0.7-3-0.5
2.8x=-2.8
x=-2.8:2.8
x=-1