Problema Solution
Tim is 9 years older than JoAnn. Six years from now the sum of their ages will be 89. (Let x represent JoAnn's current age in years. Complete the table below such that each entry is in terms of x.)
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Let
x represent Joann's current age in years
y represent Tim's current age in years
Tim is 9 years older than Joann:
y = x + 9
Six years from now the sum of their ages will be 89:
(x + 6) + (y + 6) = 89
by solving the system of equations:
y = x + 9
(x + 6) + (y + 6) = 89
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x = 34 years
y = 43 years
Tim's current age is 43 years.
Joann's current age is 34 years.