Реши уравнения. 64 - × = 4, 53 + × = 56, 81 - × = 80 , ×+ 70 = 100, 45 - × = 40, × + 4 =...

Question

Реши уравнения. 64 - × = 4, 53 + × = 56, 81 - × = 80 , ×+ 70 = 100, 45 - × = 40, × + 4 = 12.

Answer 1

1) 64-x=4
-x=4-64
-x=-60 |•(-1)
x=60
2) x=56-53
x=3
3)-x=80-81
-x=-1 |•(-1)
x=1

Answer 2

64-х=4;
х= 64-4;
х=60.
проверка:
64-60=4
Ответ.4

53+х=56;
х=56-53;
х=3.

81-х=80;
х=81-80;
х=1.

х+70=100;
х=100-70;
х=30.

45-х=40;
х=45-40;
х=5.

х+4=12;
х=12-4;
х=8.