Question

2,4(b-0,6)+3,2(b-0,4)=4

Answer 1

2.4(b - 0.6) + 3.2(b - 0.4) = 4
2.4b - 1.44 + 3.2b - 1.28 = 4
5.6b = 4 + 2.72
5.6b = 6.72
b = 6.72 : 5.6
b = 1.2

Answer 2

2,4в-1,44+3,2в-1,28=4
5,6в-2,72=4
5,6в=6,72
в=1,2