Question

Segunda Parte Me Ajudem?

Answer 1

10) 7x?-13=60 = 60-13/7=47/7=9
11)a) 23 +? -1=30  23 - 1 = 22   30-22=8
b)3x?=111   111/3 = 37
c)? x 33=198     198/3=6
d)2? x 5 - 1 = 99    = 99 + 1= 100/5=20
12)15x3+7=42/2=41