Solve for X in -x + 8/3x + 5 = 1-x: Linear Equation with Fractions

Question

Solve for x:

x+813x+5=1x -x+8\cdot\frac{1}{3}x+5=1-x

Video Solution

Solution Steps

00:00 Find X
00:03 Arrange the equation so that only the unknown X is on one side
00:27 Group terms
00:36 Multiply by the reciprocal fraction to isolate X
00:47 Simplify what we can
00:54 Factor 8 into 2 and 4
01:00 Simplify what we can
01:05 This is the solution to the question

Step-by-Step Solution

To solve this linear equation, we will follow these steps:

  • Simplify the left-hand side by expanding and combining like terms.
  • Isolate xx on one side of the equation.
  • Solve for xx.

Let's perform these steps:

We start with the equation: x+813x+5=1x -x + 8 \cdot \frac{1}{3}x + 5 = 1 - x .

First, simplify the term 813x8 \cdot \frac{1}{3}x to 83x\frac{8}{3}x.

The equation becomes:

x+83x+5=1x-x + \frac{8}{3}x + 5 = 1 - x.

Combine the like terms x-x and 83x\frac{8}{3}x:

(1+83)x=83x33x=53x\left(-1 + \frac{8}{3}\right)x = \frac{8}{3}x - \frac{3}{3}x = \frac{5}{3}x.

The equation simplifies to:

53x+5=1x\frac{5}{3}x + 5 = 1 - x.

Add xx to both sides to eliminate xx on the right-hand side:

53x+x+5=1\frac{5}{3}x + x + 5 = 1.

Convert xx to a fraction: x=33xx = \frac{3}{3}x, so:

(53+33)x+5=1\left(\frac{5}{3} + \frac{3}{3}\right)x + 5 = 1.

This simplifies to:

83x+5=1\frac{8}{3}x + 5 = 1.

Subtract 55 from both sides to isolate terms involving xx:

83x=15\frac{8}{3}x = 1 - 5, which simplifies to:

83x=4\frac{8}{3}x = -4.

Isolate xx by multiplying both sides by the reciprocal of 83\frac{8}{3}:

x=4×38x = -4 \times \frac{3}{8}.

Calculate the value:

x=128x = -\frac{12}{8}.

Simplify the fraction:

x=32x = -\frac{3}{2}.

Therefore, the solution to the equation is x=32 x = -\frac{3}{2} .

Answer

32 -\frac{3}{2}