Father and son

Father and son are 74 years old together. Son is 30 years younger than father. How old is the son?

Correct answer:

S =  22

Step-by-step explanation:

x+y=74 yx=30  x+y=74 xy=30  Row2Row1Row2 x+y=74 2y=104  y=2104=52 x=74y=7452=22  x=22 y=52  S=x=22=22



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