5a+(a-4)-(2a-3) 4(x-5)-2(X+3)
5а+а-4-2а+3=4а-1 4х-20-2х-6=2х-26
5a+(a-4)-(2a-3) 5a+a-4-2a+3 4a-1 4(x-5)-2(X+3) 4x-5-2x-3 2x-8