Question

p+m=120
p=(2*m)-12
p=?
m=?

Answer 1

inlocuiesti in prima relatie p si obtii 2m - 12 +m=120 de unde rezulta 3m=132; m=44
p=2*44-12=88-12=76

Answer 2

p+m=120
p=(2*m)-12

(2*m)-12+m=120
2m-12+m=120
3m=120+12
3m=132
m=132:3
m=44

p=2*44-12
p=88-12
p=76