Question

Chelsea shows her work in finding the solution to 40x– 5 = 2+ 3(x– 3). After

checking her answer in the original equation, she found that it did not work. Where did she make a mistake?
a. step 1: she distributed incorrectly
b. step 2: She subtracted 3x incorrectly
c. Step 3: she’s simplified incorrectly
d. step four: she subtracted 5 instead of adding 5

Answer 1

Step 4: She subtracted 5 instead of adding 5.

Answer 2

The mistake that Chelsea made was that she instead of adding 5 to both sides at step 4, she subtracted them. If she added the 5 instead of subtracting it, the answer she should've gotten was -2.