Question

(a : 4) + 42 = 51
(7 x a) + 21 = 70
90 - (6 x a) = 36
24 + (8 x a) = 72
(63: a) + 36 = 45​

Answer 1

(a : 4) + 42 = 51

a : 4 = 51 -42

a:4=9=> a=4 x 9 => a=36

(7 x a) + 21 = 70

7a = 70 -21

7a=49=> a=49/7 => a=7

90 - (6 x a) = 36

6a=90-36

6a=54=> a=54/6 => a=9

24 + (8 x a) = 72

8a=72-24

8a=48 =>a=48/8 => a=6

(63: a) + 36 = 45​

63 : a = 45-36

63 : a = 9 =.> 63 / 9 => a=7

Answer 2

SUCCES LA ȘCOALĂ!!!!!!!!