Question

[(3×a+5)×3+5]×3+5=92


ofer coroana!

Answer 1

[(3×a+5)×3+5]×3=92-5

[(3×a+5)×3+5]×3=87

[(3×a+5)×3+5]=87:3

(3×a+5)×3+5=29

(3×a+5)×3=29-5

(3×a+5)×3=24

(3×a+5)=24:3

3×a+5=8

3×a=8-5

3×a=3

a=3:3

a=1