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What value of $a$ is a solution to this equation? $\newline$ $2a = 20$ $\newline$ Choices: $\newline$ (A) $a = 8$ $\newline$ (B) $a = 10$

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Which x satisfies an equation?

Full solution

Q. What value of

a

is a solution to this equation?

\newline

2a = 20

\newline

Choices:

\newline

(A)

a = 8

\newline

(B)

a = 10

Isolate $a$ in equation: Step $1$ : Start by isolating $a$ in the equation $2a = 20$ . To find $a$ , divide both sides of the equation by $2$ . $\frac{2a}{2} = \frac{20}{2}$ $a = 10$
Check answer choices: Step $2$ : Check the answer choices to see which matches the solution. $\newline$ The choices are (A) $a = 8$ and (B) $a = 10$ . $\newline$ Since we calculated $a = 10$ , the correct choice is (B) $a = 10$ .

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