este cu mersul invers ajutatima

Este Cu Mersul Invers Ajutatima class=

Răspuns :

[26+(x-7)×12]:2=49
26+(x-7)×12=49×2
26+(x-7)×12=98
(x-7)×12=98-26
(x-7)×12=72
x-7=72:12
x-7=6
x=6+7
x=13
[26+(x-7)×12]:2=49
26+(x-7)×12=49×2
26+(x-7)×12=98
(x-7)×12=98-26
(x-7)×12=72
x-7=72:12
x-7=6
x=6+7
x=13