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: addition property of equalitymultiplication property of equalitycombined like terms

Step 2: subtraction property of equalitydivision property of equalitycombined like terms

Step 3: addition property of equalitydivision property of equalitycombined like terms