Solve for X: Finding the Solution to -1/2x + 3 = 7x - 27

Question

Solve for X:

12x+3=7x27 -\frac{1}{2}x+3=7x-27

Video Solution

Solution Steps

00:00 Solve
00:04 We want to isolate the unknown X
00:21 Let's reduce what we can
00:32 Collect terms
00:39 Isolate the unknown X
00:55 Let's reduce what we can
01:13 Convert from mixed number to improper fraction
01:16 Multiply by the reciprocal fraction to isolate X
01:29 Let's reduce what we can
01:38 Make sure to multiply numerator by numerator and denominator by denominator
01:41 And this is the solution to the question

Step-by-Step Solution

To solve the equation 12x+3=7x27-\frac{1}{2}x + 3 = 7x - 27, follow these steps:

  • Step 1: Eliminate the fraction
    Multiply every term in the equation by 2 to remove the fraction: 2×(12x+3)=2×(7x27) 2 \times \left(-\frac{1}{2}x + 3\right) = 2 \times (7x - 27) This simplifies to: x+6=14x54 -x + 6 = 14x - 54

  • Step 2: Move variable terms to one side
    Add xx to both sides to move the xx-terms to one side: x+x+6=14x+x54 -x + x + 6 = 14x + x - 54 This simplifies to: 6=15x54 6 = 15x - 54

  • Step 3: Move constant terms to the other side
    Add 54 to both sides to move the constant terms: 6+54=15x54+54 6 + 54 = 15x - 54 + 54 60=15x 60 = 15x

  • Step 4: Solve for xx
    Divide both sides by 15 to isolate xx: 6015=x \frac{60}{15} = x ,x=4 x = 4

Therefore, the solution to the equation is x=4 x = 4 .

Answer

4 4