Solve Linear Equation: Finding X in -3x+8-11=40x+5x+9

Question

Find the value of the parameter X

3x+811=40x+5x+9 -3x+8-11=40x+5x+9

Video Solution

Solution Steps

00:00 Solve
00:03 We want to isolate the unknown X
00:07 Let's group terms
00:17 Let's arrange the equation so that one side has only the unknown X
00:33 Let's simplify what we can
00:46 Let's isolate the unknown X and calculate
01:02 Let's simplify what we can
01:06 Let's continue to isolate the unknown X
01:19 Let's factor 48 into 12 and 4
01:25 Let's simplify what we can
01:31 This is the solution to the question

Step-by-Step Solution

To solve the equation 3x+811=40x+5x+9 -3x + 8 - 11 = 40x + 5x + 9 , we need to combine and simplify terms:

  • Simplify each side separately. Start with the right side: 40x+5x+9=45x+9 40x + 5x + 9 = 45x + 9 .
  • Now simplify the left side: 3x+811=3x3 -3x + 8 - 11 = -3x - 3 .

The equation is now: 3x3=45x+9 -3x - 3 = 45x + 9 . Next, move all x x -terms to one side and constants to the other side:

  • Add 3x 3x to both sides: 3x3+3x=45x+9+3x -3x - 3 + 3x = 45x + 9 + 3x , which simplifies to: 3=48x+9 -3 = 48x + 9 .

Then, move the constant term 9 9 to the left side:

  • Subtract 9 9 from both sides: 39=48x+99 -3 - 9 = 48x + 9 - 9 , which simplifies to: 12=48x -12 = 48x .
  • Solve for x x by dividing both sides by 48: x=1248 x = \frac{-12}{48} .
  • Simplify the fraction: x=14 x = -\frac{1}{4} .

Therefore, the solution to the problem is x=14 x = -\frac{1}{4} .

Answer

14 -\frac{1}{4}