Question

obter os valores de A e B na proporçao a/b=5/4 sabendo q a-b=12

Answer 1

a/b=5/4
a-b=12

4a=5b
a=5b/4

a-b=12
5b/4-b=12
5b/4-b/1=12/1
5b/4-4b/4=48/4
5b-4b=48
b=48

a-b=12
a-48=12
a=12+48
a=60