X-35=70-9 100-d=20+30 y*4=8

Решаем уравнения: 1) x - 35 = 70 - 9; x - 35 = 61; x = 61 + 35; x = 96; 2) 100 - d = 20 + 30; 100 - d = 50; d = 100 - 50; d = 50; 2) y * 4 = 8; y = 8 : 4; y = 2.