Question

1. Solve the following equations for x:

a. X - 9 = -21
b. 10 + x = 112
C. 14 = x - 30
d. 12 - x = 3

Answer 1

• A. X=-12
• B. X=102
• C. X=44
• D. X=15

Explanation:

Isolate the term of x from one side of the equation.

Part A. x-9=-21

First, add by 9 from both sides.

x-9+9=-21+9

Solve.

-21+9=-12

X=-12

Part B. 10+x=112

Switch sides.

x+10=112

Subtract by 10 from both sides.

x+10-10=112-10

Solve.

112-10=102

X=102

Part C. 14=x-30

Switch sides.

x-30=14

Add by 30 from both sides.

x-30+30=14+30

Solve.

x=44

Part D. 12-x=3

Switch sides.

x-12=3

Add by 12 from both sides.

x-12+12=3+12

Solve.

Add the numbers from left to right.

3+12=15

x=15

• Therefore, the correct answer is part A: x=-12, part B: x=102, part C: x=44, and part D: x=15.

I hope this helps you! Let me know if my answer is wrong or not.