Step 1: Marlena added x to both sides to eliminate the variable from the right side of the equation.
Step 2: Marlena combined like terms on the left side of the equation.
Step 3: Marlena divided both sides by 3 to solve for x.
Marlena solved the equation 2x + 5 = –10 – x. Her steps are shown below.
2x + 5 = –10 – x
3x + 5 = –10
3x = –15
x = –5
Use the drop-down menus to justify Marlena’s work in each step of the process.
Step 1: _________________
Step 2: _______________
Step 3: _____________
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