Question

a + b = 12
( A + B ) : ( A - B ) = 5
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a,b = ?

Answer 1

[tex]\sf A+B=12 \\ (A+B):(A-B)=5 \\ A+B=5(A-B) \\ 12=5(A-B) \\ A-B=2,4 \\ A+B=12 \\ -------(+) \\ 2A=14,4 \\ \boxed{\sf A=7,2} \\ B=12-7,2 \\ \boxed{\sf B=4,8}[/tex]