Реши уравнения:1)150-x:2=140,2)(150-x):2=65,3)(300-18)•x=1410,4)5•x-600=900
1) 150 - x / 2 = 140 x / 2 = 10 x = 20 2) (150 - x) / 2 = 65 150 - x = 130 x = 20 3) (300 - 18) * x = 1410 282 * x = 1410 x = 5 4) 5 * x - 600 = 900 x - 120 = 180 x = 300