Question

Afla termenul necunoscut;
A) (49: 7 ) + a = 70
B) ( 8 x a ) - 26 =30
C) ( 72 : a ) + 48 = 56
D) 6 x 4 : a = 8
E) 7 x 7 - a = 30

Answer 1

A) 7+a=70 => a=70-7 => a=63
B) 8xa=30+26 => 8xa= 56 => a=7
C) 72:a=56-48 => 72:a= 8 => a=9
D) 24:a=8 => a=3
E) 49-a=30 => a=49-30 =>a=19