Question

5. Реши уравнения.
38 + x = 72
x - 31 = 45
х: 4 = 20
6 .y = 18
b: 7 = 5
36:c= 9​

Answer 1

$38 + x = 72 \\ x = 72 - 38 \\ x = 34$

$x - 31 = 45 \\ x = 45 + 31 \\ x = 76$

$x \div 4 = 20 \\ x = 20 \times 4 \\ x = 80$

$6 \times y = 18 \\ y = 18 \div 6 \\ y = 3$

$b \div 7 = 5 \\ b = 5 \times 7 \\ b = 35$

$36 \div c = 9 \\ c = 36 \div 9 \\ c = 4$

Answer 2

1) х=-38+72
х=34
2) х=45+31
х=76
3) х=20*4
х=80
4) у=18:6
у=3
5) b=5*7
b=35
6) c=36:9
c=4