Afla Nr necunoscut [26+(x-7)*12]:2=49

Răspuns :

[26+(x-7)*12]:2=49
[26+(x-7)x12]=49x2
[26+(x-7)x12]=98
(x-7)x12=98-26
(x-7)x12=72
x-7=72:12
x-7=6
x=7+6
x=13
26+(x-7)·12=98
(x-7)·12=72
x-7=6
x=13