👤



a-b=139
a:b×2=10r6
a=?
b=?


Răspuns :

a-b=139    b=a-139
a:bx2=10 rest 6
2a=10b+6
a=5b+3
a=5(a-139)+3
a=5a-695+3
a=5a-692
4a=692
a=173
b=a-139=34

verificare
173-34=139
173:34 x2=173x2:34=346:340 = 10 si rest 6