Solve for X: 6(x+4)-4 = 8(x+5) Linear Equation Solution

Question

Solve for X:

6(x+4)4=8(x+5) 6(x+4)-4=8(x+5)

Video Solution

Solution Steps

00:00 Find X
00:04 Carefully open brackets properly, multiply by each factor
00:20 Solve each multiplication separately
00:35 Combine like terms
00:47 Arrange the equation so that only the unknown X is on one side
01:06 Combine like terms
01:16 Isolate X
01:26 Simplify as much as possible
01:29 This is the solution to the problem

Step-by-Step Solution

To solve this problem, we'll follow these steps:

  • Expand both sides using the distributive property.
  • Combine like terms and simplify.
  • Isolate the variable x x .

Let's work through the steps in detail:

Step 1: Apply the distributive property:
- Left side: 6(x+4) 6(x+4) expands to 6x+24 6x + 24 .
- Right side: 8(x+5) 8(x+5) expands to 8x+40 8x + 40 .
Substituting back, the equation becomes:

6x+244=8x+40 6x + 24 - 4 = 8x + 40

Step 2: Simplify the equation by combining like terms:
- 24 - 4 simplifies to 20 on the left-hand side.
The equation now is:

6x+20=8x+40 6x + 20 = 8x + 40

Step 3: Isolate the variable x x :
- First, eliminate 6x 6x from the left side by subtracting 6x 6x from both sides:

20=2x+40 20 = 2x + 40

- Next, eliminate 40 from the right side by subtracting 40 from both sides:

2040=2x 20 - 40 = 2x
20=2x -20 = 2x

Step 4: Solve for x x by dividing both sides by 2:

x=202 x = \frac{-20}{2}
x=10 x = -10

Therefore, the solution to the problem is x=10 x = -10 .

Answer

10 -10