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Given: -3x+20=8; prove: x=4

User PSyton
by
7.2k points

2 Answers

6 votes

Answer:

x = 4

Explanation:

Step 1: Write equation

-3x + 20 = 8

Step 2: Solve for x

  1. Subtract 20 on both sides: -3x = -12
  2. Divide both sides by -3: x = 4

Step 3: Check

Plug in x to verify it's a solution.

-3(4) + 20 = 8

-12 + 20 = 8

8 = 8

User DKnight
by
8.4k points
3 votes

Answer:

4

Explanation:

Step 1:

- 3x + 20 = 8 Equation

Step 2:

- 3x = 8 - 20 Subtract 20 on both sides

Step 3:

- 3x = - 12 Subtract

Step 4:

x = - 12 ÷ - 3 Divide

Answer:

x = 4

Hope This Helps :)

User Jonathan Lidbeck
by
8.4k points

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