Question

What is the solution to the equation?

4(3 + 7) = 4 • x + 4 • 7



A.


x = 3


B.


x = 4


C.


x = 7


D.


x = 10

Answer 1

Notice how the 4 distributes (basically the outside 4 is multiplied by EVERY term inside)
\[\Large 4(3+7) = 4 \cdot x + 4 \cdot 7\]
\[\Large {\color{red}{4}}(3+7) = {\color{red}{4}} \cdot x + {\color{red}{4}} \cdot 7\]