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nadezda [96]
4 years ago
8

What is the value of a in the equation 3 a plus b equals 54, when b equals 9?

Mathematics
2 answers:
NikAS [45]4 years ago
5 0

Answer:

a = 15

Step-by-step explanation:

Given

3a + b = 54 ← substitute b = 9

3a + 9 = 54 ( subtract 9 from both sides )

3a = 45 ( divide both sides by 3 )

a = 15

Butoxors [25]4 years ago
4 0

3a+b=54, b=9

3a +9 =54

3a= 54-9=45

a= 45÷3=15

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Since we’ve been given a ratio, 3:8, we can convert that into a fraction and form an equation from it:

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The reason the numerator on the second fraction is 27/3 is because the team scored 27 points, not 27 baskets.

Simplify (Also replace the ? with an unknown variable):

\frac{3}{8} = \frac{9}{n}

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