Question

Solving a One-Step Equation

Answer 1

Answer/Step-by-step explanation:

To solve the given expression, $x + 12.7 = -25.2$, the following steps as well as justification for each step is given below:

Step 1: state the given expression

$x + 12.7 = -25.2$ (given)

Step 2: solve for x by subtracting 12.7 from each side of the equation.

$x + 12.7 - 12.7 = -25.2 - 12.7$

Step 3: Apply the additive inverse rule and simplify (i.e the additive inverse of 12.7 is -12.7. when added, it gives us 0)

$x + 0 = -37.9$ (additive inverse/simplification)

Step 4: additive identity rule (i.e. the 0 added to x = 0)

$x + 0 = -37.9$ (identity property of addition)