Question

sabendo que a+b=100, os valores de $\frac{a}{7}$ = $\frac{b}{3}$ são?

Answer 1

Resposta:

a+b= 100

a/7= b/3

a+b/7+3= a/7

100/10= a/7

10/1= a/7

a= 70

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100/10= b/3

10/1= b/3

b= 30