Question

solve $3ax + 4ax = 5ax + 4$ for $x$. assume $a \
eq 0$.\
\
a. $x = \frac{1}{3a}$\
\
b. $x = 3a$\
\
c. $x = 2a$\
\
d. $x = \frac{2}{a}$

Explanation:

Step1: Combine like terms left side

$3ax + 4ax = 7ax$

Step2: Subtract $5ax$ from both sides

$7ax - 5ax = 4$
$2ax = 4$

Step3: Solve for $x$ (divide by $2a$)

$x = \frac{4}{2a} = \frac{2}{a}$

Answer:

D. $x = \frac{2}{a}$