Question

5+4=
156:3=
90x5=
12x=132

Answer 1

$5 + 4 = 9 \ 156 div 3 = 52 \ 90 times 5 = 450$

$12x = 132 \ x = 132 div 12 \ x = 11$

Answer 2

5+4=9

156:3=52

90*5=450

12х=132

Х=132:12

Х=11