Question

Writing about Solving a Subtraction Equation. Explain how to solve the equation b-7 = 12.

a) Add 7 to both sides of the equation.
b) Subtract 12 from both sides of the equation.
c) Multiply both sides by 7.
d) Divide both sides by 12.

Answer 1

The equation b - 7 = 12 is solved by adding 7 to both sides, which isolates the variable b, resulting in b = 19.

Step-by-step explanation:

To solve the subtraction equation b - 7 = 12, you should perform an operation that will isolate the variable b on one side of the equation. This is done by adding 7 to both sides of the equation to cancel out the subtraction of 7 from b. The correct choice is therefore (a) Add 7 to both sides of the equation. Now, let's solve it step by step:

1. Add 7 to both sides of the equation: b - 7 + 7 = 12 + 7.
2. Simplify both sides: b = 19.

Now you have the solution to the equation, which is b = 19.