Răspuns :
[3×(3*x+5)+7]:26=5
[3×(3*x+5)+7]=5×26
[3×(3*x+5)+7]=130
3×(3*x+5)=130-7
3×(3*x+5)=123
3*x+5=123:3
3*x+5=41
3*x=41-5
3*x=36
x=36:3
x=12
Răspuns: x=12
[ 3 × ( 3× x + 5 ) + 7 ] : 26 = 5
[(9x+15)+7]:26=5
(9x+22):26=5
9/26x+22/26=5 /*26
9x+22=130 /-22
9x=108 /:9
x=12