Question

Afla termenul necunoscut ;
a : ( 42 - 36 ) = 7
b x (428 - 419 ) = 90
c : ( 63 : 7 ) = 4

Answer 1

a:6=7
a=6x7=42

bx9=90
b=90:9=10

c:9=4
c=4x9=36

Answer 2

a:(42-36)=7
a:6=7
a=6x7
a=42

bx(428-419)=90
bx9=90
b=90:9
b=10


c:(63:7)=4
c:9=4
c=9x4
c=36