Question

afla x stiind ca (x:4+5)x3-1=20

Answer 1

Răspuns

(x:4+5)·3-1=20

(x:4+5)·3=20+1

x:4+5=21:3

x:4=7-5

x=2·4

x=8

Answer 2

Răspuns

x=8

Explicație pas cu pas:

( x:4+5) x3-1=20

(x:4+5)x3= 20+1

(x:4+5) x3=21

x:4+5= 21:3

x:4+5=7

x:4=7-5

x:4=2

x=2x4

x=8