Solve ax−12=9
A. x=−3a
B. x=3a
C. x=−21a
D. x=21a
To solve the equation ax - 12 = 9, we can first add 12 to both sides of the equation:
ax - 12 + 12 = 9 + 12
ax = 21
Next, we can divide both sides of the equation by a to solve for x:
(ax)/a = 21/a
x = 21/a
Therefore, the correct answer is D. x = 21a.
To solve the equation ax - 12 = 9, we need to isolate the variable x.
First, we can add 12 to both sides of the equation to get:
ax - 12 + 12 = 9 + 12
This simplifies to:
ax = 21
Next, we can divide both sides of the equation by a to get:
(ax) / a = 21 / a
This simplifies to:
x = 21 / a
Therefore, the solution to the equation is x = 21/a.
So, the correct answer is D. x = 21a.