Question

X -12 = 0



25+x=25




x:108=1




y:1 = 37




x×15= 0



X × 18 = 18

Answer 1

x-12=0
x=12+0
x=12

25+x=25
x=25-25
x=0

x:108=1
x=108•1
x=108

y:1=37
y=37•1
y=37

x•15=0
x=0:15
x=0

x•18=18
x=18:18
x=1