Question

6.4*(2-3у)=6*(0.8у-1)+6.8

Answer 1

6,4*2 - 6,4*3y = 6*0,8y - 6 + 6,8
12,8 - 19,2y = 4,8y + 0,8
12,8 - 0,8 = 4,8y + 19,2y
12 = 24y
12/25 = y
y = 0,5

Answer 2

12.8-19.2y=4.8y-6+6.8
-19.2y-4.8y=-6+6.8-12.8
-24y=-12
y=0.5