Step-by-step explanation:
1.)
x/3 + 8 = 13
x/3 = 5
x = 15
2.)
m/6 + 2 = 12
m/6 = 10
m = 60
3.)
p/4 - 19 = 6
p/4 = 25
p = 100
4.)
y/7 - 10 = -1
y/7 = 9
y = 63
