X-15=5 10+x=55 123:50 100+556

Question

X-15=5 10+x=55 123:50
100+556

Answer 1

1) Х - 15 = 5
Х = 5 + 15
Х = 20

2) 10 + Х  = 55
Х = 55 - 10
Х = 45

3) 123: 50 = 123 : (10 * 5) = 12,3 : 5 = 2,46

4) 100 + 556 = 656