Question

M+N=110 N=M+30
Află cele două numere!

Answer 1

M+N=110
N=M+30

M+M+30=110
2M=110-30
2M=80
M=80:2
M=40

N=40+30
N=70

Answer 2

M+N=110
N=M+30
inlocuim.....
M+M+30=110
2M=110-30
2M=80
M=80:2
M=40

N=M+30
N=40+30
N=70