Question

Aflati pe x din [ 3 × ( 3× x + 5 ) + 7 ] : 26 = 5

Answer 1

[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

Answer 2

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