SOLUTION: If A-B=30 and A+B=60 find the value of A and B

Question 1035585: If A-B=30 and A+B=60 find the value of A and B
Answer by ikleyn(52781) (Show Source): You can put this solution on YOUR website!
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If A-B=30 and A+B=60 find the value of A and B
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A - B = 30,    (1)
A + B = 60.    (2)

Once you see two equations like (1) and (2), add them immediately. You will get

2A = 30 + 60 = 90 --->  A =  = 45.

Thus you just found one unknown.

Now from (2)  B = 60 - A = 60 - 45 = 15.

The problem is solved.  A = 45, B = 15.

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