Question

Slove for x 10(2x-4)=100x A.x=7 B.x=3 C.x=1/2 D.x=-1/2

Answer 1

The answer is D. x=-1/2

Explanation:

• multiply the parantheses by 10 that'll give us 20x-40=100x
• 2. move terms, that'll give us 20x-100x=40
• 3. subtract 100x from 20x, that'll give us -80x=40
• 4. divide both sides by -80, which is x=-1/2

Answer 2

• D. x = -1/2

Explanation:

• 10(2x - 4) = 100x

1. Divide both sides by 10.

• 10/10 (2x - 4) = 100x/10
• 2x - 4 = 10x

2. Add 4 to both sides.

• 2x - 4 +4 = 10x + 4
• 2x = 10x + 4

3. Subtract 10x from both sides.

• 2x - 10x = 10x + 4 - 10x
• -8x = 4

4. Divide both sides by -8.

• -8x/-8 = 4/-8
• x = -1/2

The answer is D.