12x=60 33y=132 51z=357 2x-15=13

Question

12x=60
33y=132
51z=357
2x-15=13

Answer 1

X=5
y=4
z=7
x=14
...................

Answer 2

1)60/12=5
2)132/33=4
3)357/51=7
4)2x-15=13
2x=28
x=28/2
x=14