0,2 × (5/7 х – 1,2) = 3/7 х – 0,64

Question

0,2 × (5/7
х – 1,2) = 3/7 х – 0,64

Answer 1

0,2*(5/7х-1,2)=3/7х-0,64
1,4*(5х-8,4)=3х-4,48
7х-11,76=3х-4,48
4х=16,24
х=16,24:4
х=4,06