What is the value of a in the equation 3a + b = 54, when b = 9?
2 answers:
Answer:
15
Step-by-step explanation:
When b = 9,
=> 3a + 9 = 54
=> 3a + 9 - 9 = 54 - 9
=> 3a = 45
=> 3a/3 = 45/3
=> a = 15
Therefore, when b is 9, a is 15
Answer:
a=15
Step-by-step explanation:
First, you will plug in 9.
Then, you'll solve for a: 3a+9=54
Then, you'll subtract 9 from both sides. It will look like this: 3a+9-9=54-9
Then: 3a=45
Then you'll divide: 3a/3=45/3
And it gives you: a=15
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