Question

Solve: 3 (x + 5) = 2x + 35

Step 1: 3x + 15 = 2x + 35
Step 2: 5x + 15 = 35
Step 3: 5x = 20
Step 4: x = 4
Which is the first incorrect step in the solution shown above?
A. Step 4
B. Step 1
C. Step 3
D. Step2

Answer 1

Explanation:

Option D is correct,

the correct solution is

3(x + 5) = 2x + 35

→ 3x + 15 = 2x + 35

→ 3x - 2x = 35 - 15

→ x = 20

verifying

3 ( 20 + 5 ) = 2(20) + 35

60 + 15 = 40 + 35

75 = 75

hence first step that is incorrect is step 2

hope this answer helps you dear!

Answer 2

I think it is step 2

Explanation:

Because if 2x comes left of the =, then +2x becomes minus, so it shouldn't be 5x but x