Solve for X: -7(x+4)-2=5(2-x) Linear Equation Solution

Question

Solve for x:

7(x+4)2=5(2x) -7(x+4)-2=5(2-x)

Video Solution

Solution Steps

00:00 Find X
00:04 Open parentheses properly, multiply by each factor
00:21 Combine like terms
00:31 Arrange the equation so that X is isolated on one side
00:48 Combine like terms
00:52 Isolate X
01:01 And this is the solution to the problem

Step-by-Step Solution

To solve the equation 7(x+4)2=5(2x)-7(x+4)-2=5(2-x), follow these steps:

  • Step 1: Distribute the coefficients across the terms inside the parentheses.
    On the left side: Apply 7-7 to (x+4) (x + 4):
    7x+(7)4=7x28-7 \cdot x + (-7) \cdot 4 = -7x - 28 .
    On the right side: Apply 55 to (2x)(2 - x):
    52+5(x)=105x5 \cdot 2 + 5 \cdot (-x) = 10 - 5x.
  • Step 2: Substitute the distributed expressions back into the equation:
    7x282=105x-7x - 28 - 2 = 10 - 5x.
  • Step 3: Simplify both sides by combining like terms:
    The left side simplifies to: 7x30-7x - 30.
    Thus, the equation becomes: 7x30=105x-7x - 30 = 10 - 5x.
  • Step 4: Get all terms involving xx on one side of the equation:
    Add 5x5x to both sides: 7x+5x30=10-7x + 5x - 30 = 10.
    This simplifies to: 2x30=10-2x - 30 = 10.
  • Step 5: Isolate the term with xx on one side:
    Add 3030 to both sides: 2x=40-2x = 40.
  • Step 6: Solve for xx by dividing by 2-2:
    x=402=20x = \frac{40}{-2} = -20.

Therefore, the solution to the equation is x=20 x = -20 .

Answer

-20