Question

0,3(2-4y)=2(0,4y-1)-1,4

Answer 1

$\displaystyle 0,3(2-4y)=2(0,4y-1)-1,4\\0,6-1,2y=0,8y-2-1,4\\0,6-1,2y=0,8y-3,4\\-1,2y-0,8y=-3,4-0,6\\-2y=-4\\y=2$