a: Two times a man's current age equals his curr...

asked Jan 16, 2017 in Mathematics by MarthaMwamba5
A: Two times a man's current age equals his current age plus 30. Write an equation to represent this situation

b: How old is the man now?

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1 Answer

answered Jan 16, 2017 by anonymous
First, make an equation. We'll use a as our variable for the man's current age.
2a = a + 30
Here's our equation, and now we just have to solve from there.
2a = a + 30
2a - a = 30
a = 30
His current age is 30.
To check that, we plug it into our equation.
2*30 = 30 + 30
60 = 60
Yes, the man's current age is 30 years.

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