Question

(6+15):х=7 х:(240+20)=2 z*(108-100)=64 у:(180-12)=4

Answer 1

21/x=7
x=21/7
x=3

x/260=2
x=260*2
x=520

z*8=64
z=64/8
z=8

y/168=4
y=4*168
y=672