Answer:
Step 3 is wrong.
Explanation:
They must subtract the 28 from 15 first. This will give you 3x=-13. Then, you divide each side by 3, giving an answer of x=-4.33, or x=-13/3.
step 3 is wrong
consider step 2
3x + 28 = 15 ( subtract 28 from both sides ) gives
3x = 15 - 28
3x = - 13 ← what step 3 should be
5.7m questions
7.4m answers