Question

Solve for a.
"15-a=11"
A.26
B.11/15
C.-4
D.4

Answer 1

D. a=4

Explanation:

To solve for a, you isolate it on one side of the equation.

First thing you do is subtract by 15 from both sides.

`\rightarrow \sf{15-a-15=11-15}`

Solve.

Add or subtract the numbers from left to right.

11-15=-4

-a=-4

Then, divide by -1 from both sides.

`\sf{(-a)/(-1)=(-4)/(-1)}}`

Solve.

Divide the numbers from left to right.

-4/-1=4

`\rightarrow \boxed{\sf{a=4}}`

Therefore, the answer is d. 4.

I hope this helps, let me know if you have any questions.