Two step equations

Mile325
Asked Oct 23, 2017
In order to solve two-step equations, we need to work backwards with regards to the order of operations. We would perform the addition & subtraction before multiplication & division.
1. Add or subtract to isolate the variable term.
2. Multiply or divide to solve for the variable.
3. Check your solutions.
Example:

In the equation 3x – 2 = 16, notice that the variable is being multiplied and has a term being subtracted. To isolate the variable, we need to add 2 to both sides and then divide both sides by 3.

Solve 3x – 2 = 16

Solution:

3x – 2 = 16
3x – 2 + 2 = 16 + 2 (add 2 to both sides)
3x = 18 (simplify)
x = 6 (divide both sides by 3)

Check:

3x – 2 = 16
3 • 6 – 2 = 16 (Substitute x = 6 into the original equation)
bryangreene
Answered Mar 04, 2019

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