Question

[(x-15)×2-34]÷11+12=18
metoda mersului invers, dau coroana!

Answer 1

Răspuns:

[(x-15)×2-34]÷11+12=18

[(x-15)×2-34]÷11=6

(x-15)×2-34=66

(x-15)×2=32

x-15=16

x=31

Answer 2

[(x-15)×2-34]÷11=18-12

[(x-15)×2-34]÷11=6

[(x-15)×2-34]=11×6

[(x-15)×2-34]=66

(x-15)×2=66+34

(x-15)×2=100

(x-15)=100÷2

(x-15)=50

x=50+15

x=65