Let's solve each question one by one.
Question 1: Solve for x. \[ x + 5 = -7 \]
To isolate x, subtract 5 from both sides: \[ x = -7 - 5 \] \[ x = -12 \]
So, the answer is: -12
Question 2: Solve for x. \[ 2x = 6.2 \]
To isolate x, divide both sides by 2: \[ x = \frac{6.2}{2} \] \[ x = 3.1 \]
So, the answer is: 3.1
Question 3: Solve for x. \[ \frac{x}{3} = -12 \]
To isolate x, multiply both sides by 3: \[ x = -12 \times 3 \] \[ x = -36 \]
So, the answer is: -36
Summary of Answers:
- -12
- 3.1
- -36