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What is 5x-7(x+1)=9 Thanks for the help
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2 votes
What is 5x-7(x+1)=9
Thanks for the help

User Anuj Khandelwal
by
4.5k points

1 Answer

1 vote

Answer:

x = -8

Explanation:

Step 1: Write equation

5x - 7(x + 1) = 9

Step 2: Solve for x

  1. Distribute -7: 5x - 7x - 7 = 9
  2. Combine like terms: -2x - 7 = 9
  3. Add 7 to both sides: -2x = 16
  4. Divide both sides by -2: x = -8

Step 3: Check

Plug in x to verify it's a solution.

5(-8) - 7(-8 + 1) = 9

-40 - 7(-7) = 9

-40 + 49 = 9

9 = 9

User Joshua
by
4.3k points
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