1)4 • (2х - 3) + 12 = 96; 4 • (2x - 3) = 96 - 12; 4 • (2x-3) = 84; 2x - 3 = 84 : 4; 2x - 3 = 21; 2х = 21 + 3;2x = 24; x = 24 : 2; x = 12;
2) (x + 3,5) • 8 - 7,2 - 26,4; (x + 3,5) • 8 = 26,4 + 7,2; (x + 3,5) • 8 = 33,6;x + 3,5 = 33,6 : 8;x + 3,5 = 4,2; x = 4,2 - 3,5;х = 0,7.