№ 4. Упростите выражение: а) 4(2х – 5) – 8(х – 1) = ………………; б) 3(10х + 2) – 6(5х – 11) = …………….; в) (5х – 7) + 10(х – 2) + 3(12 – 5х) = ………..; г) 7(3х – 4) – 4(4х + 3) – 5(х – 1) = ………

4(2х – 5) – 8(х – 1) = 8х-20-8х+8 = -12 3(10х + 2) – 6(5х – 11) = 30х+6-30х+66 = 72 (5х – 7) + 10(х – 2) + 3(12 – 5х) = 5х-7+10х-20 = 15х-27 7(3х – 4) – 4(4х + 3) – 5(х – 1) = 21х-28-16х-12-5х+5 = -35