Question

10% de 600

25% de 500

30% de 1000

12% de 150

Answer 1

600/x=100/10

mutiplica invertido

6000=100x
-100x=6000   (-1)
100x=6000
x=6000/100
x=60

500/x=100/25
12500=100x
-100x=-12500   (-1)
x=12500/100
x=125

1000/x=100/30
30000=100x
-100x=-30000   (-1)
x=30000//100
x=300


150/x=100/12
1800=100x
-100x=-1800    (-1)
100x=1800
x=1800/100
x=18
 

Answer 2

Resposta:

10% => 0.10

0.10x600=60

25% => 0.25

0.25x500=125

30% => 0.30

0.30x1000=300

12% => 0.12

0.12x150=18