Question

Решить уравнения.
70×9+y=742;
(700-70)÷a=45×2;
(600+400)÷x=40×2
210-x=100+25

Answer 1

1. y=70×9
y=630
y=742-630
y=112

70×9+112=742

Answer 2

1. 70х9+у=742
У=742-630
У=112