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What value of $u$ is a solution to this equation? $\newline$ $u + 20 = 30$ $\newline$ Choices: $\newline$ (A) $u = 10$ $\newline$ (B) $u = 12$

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Which x satisfies an equation?

Full solution

Q. What value of

u

is a solution to this equation?

\newline

u + 20 = 30

\newline

Choices:

\newline

(A)

u = 10

\newline

(B)

u = 12

Subtract to isolate u: To find the value of u that solves the equation, we need to isolate u on one side of the equation. We can do this by subtracting $20$ from both sides of the equation. $\newline$ $u + 20 - 20 = 30 - 20$
Calculate $u$ : After performing the subtraction, we get the value of $u$ . $u = 10$
Check answer choices: Now we need to check the answer choices to see which one matches our solution. $\newline$ (A) $u = 10$ is the correct answer because it matches the solution we found. $\newline$ (B) $u = 12$ does not match our solution.

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