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OpenStudy (anonymous):
Mary and Marsha have a combined age of 36. Marsha is twice as old as Mary. How old is Mary?
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Mehek (mehek14):
2x + x = 36
Mehek (mehek14):
2x + x = 3x
OpenStudy (thatonegirl_):
well start with what you know. Make Mary=x. Now you can have marsha=2x (twice the age of mary). Then set x+2x=36 (because it is the combined age of both of them). Solve for x and that gives you the age of Mary. If you wanted to know Marsha's, just double it.
Mehek (mehek14):
3x = 36 divide 36/3 @Caitlyn_Morgan
OpenStudy (anonymous):
Thank you both! ^-^
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Mehek (mehek14):
what did you get?
OpenStudy (anonymous):
I got 12
Mehek (mehek14):
ok correct
OpenStudy (thatonegirl_):
Ur welcome :)
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