Question

AJUDA NOS EXERCÍCIOS NÚMEROS 8 E 9

Answer 1

8)
x+y=21

x/y= 36/48

48x=36y
x=36y/48

36y/48+y=21
(36y+48y)/48 =21
84y/48=21
84y=21*48
y=1008/84
y=12

x=(36*12) / 48
x=9

9)
9+15+8=96
32=96
96/32=3

a=9*3 = 27
b=15*3 = 45
c= 8 *3 = 24