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5 votes
What is the value of a in the equation 5a-10b=45 when b=3

2 Answers

6 votes
Since b = 3 the equation changes

5a - 10(3) = 45
5a - 30 = 45

(Add 30 to both sides)
5a = 75
Divide 5 to both sides
a = 15
User Crocefisso
by
8.4k points
3 votes
If you would like to solve the equation 5 * a - 10 * b = 45, when b = 3, you can calculate this using the following steps:

b = 3
5 * a - 10 * b = 45
5 * a - 10 * 3 = 45
5 * a - 30 = 45
5 * a = 45 + 30
5 * a = 75 /5
a = 75 / 5
a = 15

Result: The value of a is 15.
User Diogo Cunha
by
7.7k points

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