Question

Afla numerele necunoscute: 1) 36:9×d=28; (e:8)+18=7×3;(32:f)-6=12:6.

Answer 1

1)36:9xd=28
4xd=28|:4
d=7
2)(e:8)+18=7x3
(e:8)+18=21|-18
e:8=3|x8
e=24
3)(32:f)-6=12:6
(32:f)-6=2|+6
32:f=8|:32
f=4

Answer 2

36:9×d=28⇒4×d=28⇒d=28:4⇒d=7
(e:8)+18=7×3⇒(e:8)+18=21⇒(e:8)=21-18⇒(e:8)=3⇒e=8×3⇒e=24
(32:f)-6=12:6⇒(32:f)-6=2⇒(32:f)=2+6⇒(32:f)=8⇒f=32:8⇒f=4
sucees