Question 971569
Mrs Roberts is 3 times as old as her son. The sum of their ages is 48 years. How old was Mrs. Roberts when her son was born. Need an algebraic equation or inequality to solve.
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let x=son's age
3x=Mrs Robert's age
x+3x=48
4x=48
x=12
3x=36
36-12=24
How old was Mrs. Roberts when her son was born?   24