Răspuns :
2ab+a1b=438
200+10a+b+100a+10+b=438
110a+2b=438-210
110a+2b=228
2b=8
b=8:2=4
110a+8=228
110a=220
a=2
224+214=438
200+10a+b+100a+10+b=438
110a+2b=438-210
110a+2b=228
2b=8
b=8:2=4
110a+8=228
110a=220
a=2
224+214=438