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What value of $a$ is a solution to this equation? $\newline$ $10a = 70$ $\newline$ Choices: $\newline$ (A) $a = 5$ $\newline$ (B) $a = 7$

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Which x satisfies an equation?

Full solution

Q. What value of

a

is a solution to this equation?

\newline

10a = 70

\newline

Choices:

\newline

(A)

a = 5

\newline

(B)

a = 7

Identify Operation: Identify the operation needed to solve for $a$ . The equation is $10a = 70$ , which means we need to isolate the variable $a$ . To do this, we will divide both sides of the equation by $10$ , the coefficient of $a$ .
Divide by $10$ : Divide both sides of the equation by $10$ . Performing the division, we get $a = \frac{70}{10}$ .
Calculate Value: Calculate the value of $a$ . $\newline$ Now, we calculate the result of $70$ divided by $10$ , which is $7$ . $\newline$ So, $a = 7$ .
Check Solution: Check the solution. $\newline$ We substitute $a = 7$ back into the original equation to verify if it is correct. $\newline$ $10a = 10 \times 7 = 70$ , which matches the original equation.

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