Question 1194178
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The information compares both Ginger's age and the professor's age to Maryann's age, so use Maryann's age as your "starting point":<br>
x = Maryann's age
x+5 = Ginger's age
3x-7 = professors' age<br>
The sum of their ages is 98:<br>
{{{x+x+5+3x-7=98}}}
{{{5x=105}}}
{{{x=21}}}<br>
You can finish from there....<br>