Question 498892: what does a = in this
2a+5=a+9
Answer by texttutoring(324)   (Show Source):
You can put this solution on YOUR website! 2a+5=a+9
Think of an algebraic equation like a balance or a teeter totter. Any operation you do to one side, you must do to the other side. Let's try to get a on the left side, and all the numbers on the right side:
2a+5=a+9
2a-a+5 = a - a + 9
a+5 = 0+9
a+5 = 9
a = 9 - 5
a = 4
Let's check it to see if it's right:
2a+5=a+9
2(4) + 5 = 4 + 9
8+5 = 4+ 9
13 = 13
Yes, it's correct. a=4
Hope that helps!
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