Răspuns :
a= b x 3
a-136=b+84
a=? b=?
a-136 = b+ 84
b x 3 -136= b+84 |-b
bx2-136 =84|+136
b x 2 = 220 |:2
b= 110
a=b x 3
a = 330
a-136=b+84
a=? b=?
a-136 = b+ 84
b x 3 -136= b+84 |-b
bx2-136 =84|+136
b x 2 = 220 |:2
b= 110
a=b x 3
a = 330