Solve for X: -x + 3(x-4) = 5 - 1/2x Linear Equation

Question

Solve for x:

x+3(x4)=512x -x+3(x-4)=5-\frac{1}{2}x

Video Solution

Solution Steps

00:00 Find X
00:04 Open brackets properly, multiply by each factor
00:16 Collect like terms
00:26 Arrange the equation so that X is isolated on one side
00:46 Collect like terms
00:53 Convert from mixed number to fraction
00:57 Multiply by the reciprocal to isolate X
01:13 This is the solution to the problem

Step-by-Step Solution

To solve the equation x+3(x4)=512x-x + 3(x-4) = 5 - \frac{1}{2}x, follow these steps:

  • **Step 1**: Distribute the 33 on the left side:
    x+3x12=512x-x + 3x - 12 = 5 - \frac{1}{2}x.
  • **Step 2**: Combine like terms on the left:
    (2x12)=512x(2x - 12) = 5 - \frac{1}{2}x.
  • **Step 3**: Add 12x\frac{1}{2}x to both sides to get only the variable terms on one side:
    2x+12x12=52x + \frac{1}{2}x - 12 = 5.
  • **Step 4**: Simplify by combining the xx terms:
    52x12=5\frac{5}{2}x - 12 = 5.
  • **Step 5**: Add 12 to both sides to isolate terms with xx:
    52x=17\frac{5}{2}x = 17.
  • **Step 6**: Multiply both sides by 25\frac{2}{5} to solve for xx:
    x=17×25=345x = 17 \times \frac{2}{5} = \frac{34}{5}.

Therefore, the solution to the problem is x=345x = \frac{34}{5}.

Answer

345 \frac{34}{5}