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AlexFokin [52]
3 years ago
13

Solve for a. 7a - 2b = 5a + b a = 2b a = 3b a = b a = b

Mathematics
1 answer:
larisa [96]3 years ago
5 0

\\
\text{Consider the equation}\\
\\
7a-2b=5a+b\\
\\
\text{to solve for a, we will first add 2b both sides. so we get}\\
\\
7a-2b+2b=5a+b+2b\\
\\
\Rightarrow 7a=5a+3b\\
\\
\text{now subtract 5a both sides. so we have}\\
\\
7a-5a=3b\\
\\
\Rightarrow 2a=3b\\
\\
\text{divide 2 both sides to get}\\
\\
\Rightarrow a=\frac{3b}{2}

Hence the value of a is: 3b/2

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If the sum of twice a number and 3 is 15. what is the value of 8x? ​
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Step-by-step explanation:

2x + 3 = 15

2x = 15-3

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