What is the value of a in the equation 3a + b = 54, when b = 9?

1 answer:

4 0

In order to do this you have to substitute b with 9 and get 3a+9=54, now subtract 9 from both sides to leave a by itself and get 3a=45, now divide 3 in both sides to leave a by itself and get a=15

Hope this helps

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