6(1.5-2.5х) = 10.5 - 1.5(5 + 2х)
9 - 15х = 10.5 - 7.5 - 3х
-15х + 3х = 10.5 - 7.5 - 9
-12х = -6
х = 0.5
6(1.5-2.5х) = 10.5 - 1.5(5 + 2х)
9 - 15х = 10.5 - 7.5 - 3х
-15х + 3х = 10.5 - 7.5 - 9
-12х = -6
х = 0.5