Solve: 7-4 (x-1) = 20 Step 1: 7-4x + 1 = 20

Step 2: 8-4x = 20.

Step 3: (-1/4) - 4x = 12 (-1/4)

Step 4: x=-3

Which is the First incorrect step in the solution shown above

A. Step 3

B. Step 4

C. Step 1

D. Step 2

Question

Mathematics

Charmer

20 April, 04:49

Solve: 7-4 (x-1) = 20 Step 1: 7-4x + 1 = 20

Step 2: 8-4x = 20.

Step 3: (-1/4) - 4x = 12 (-1/4)

Step 4: x=-3

Which is the First incorrect step in the solution shown above

A. Step 3

B. Step 4

C. Step 1

D. Step 2

+4

Answers (1)

Know the Answer?

Alonso Zhang · Answer 1

C

Step-by-step explanation:

given 7 - 4 (x - 1) = 20 (Step 1 is to distribute the parenthesis)

7 - 4x + 4 = 20 (not 7 - 4x + 1 = 20 ← - 1 is multiplied by - 4)

Step 1 ← is incorrect → C

Solve: 7-4 (x-1) = 20 Step 1: 7-4x + 1 = 20Step 2: 8-4x = 20.Step 3: (-1/4) - 4x = 12 (-1/4)Step 4: x=-3Which is the First incorrect step in the solution shown aboveA. Step 3B. Step 4C. Step 1D. Step 2

Solve: 7-4 (x-1) = 20 Step 1: 7-4x + 1 = 20

Step 2: 8-4x = 20.

Step 3: (-1/4) - 4x = 12 (-1/4)

Step 4: x=-3

Which is the First incorrect step in the solution shown above

A. Step 3

B. Step 4

C. Step 1

D. Step 2