Question

Você consegue resolver esse problema?

Answer 1

a)

7/5=x/9

5x=9.7

5x=63

x=63/5

x=12,6

b)

x/6=y/4

x/y=6/4

(x+y):x=(6+4):6

15/x=10/6

10x=15.6

10x=90

x=90/10

x=9

9+y=15

y=15-9

y=6