Solve using the multiplication principle.
-$$7 x = 28$$
A) 21
B) 4
C) $\frac { 1 } { 4 }$
D) 196

Question

Quizplus · Accepted Answer

The multiplication principle states that we can multiply both sides of an equation by the same non-zero number and still have an equivalent equation. To isolate the variable x in this equation, we must divide both sides by 7. This gives us:

\begin{align*}
7x &= 28 \
\frac{7x}{7} &= \frac{28}{7} \
x &= 4
\end{align*}

Therefore, the correct answer is choice B, which is 4.

Solve Using the Multiplication Principle 7x=287 x = 287x=28 A) 21 B) 4 C)

Solve Using the Multiplication Principle $7 x = 28$ A) 21
B) 4
C)