Solve the Linear Equation Involving Fractions: Finding X in 6x - 36/80 + 15x = -8x + 19/20

Solve for X:


6x3680+15x=8x+1920 6x-\frac{36}{80}+15x=-8x+\frac{19}{20}

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Step-by-step video solution

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00:10 Let's find the value of X.
00:13 First, we group the factors together.
00:18 Decompose 36 into two factors, 9 and 4.
00:23 Now, let's break 80 into factors, 20 and 4.
00:35 Next, simplify whatever is possible.
00:45 Arrange the equation to get X alone on one side.
01:04 Group the factors once more.
01:19 Decompose 28 into 7 and 4.
01:23 Decompose 20 into 5 and 4.
01:26 Simplify again if you can.
01:29 Isolate X to solve for it.
01:43 Rewrite division as multiplying by the reciprocal.
01:47 Ensure you multiply numerator by numerator and denominator by denominator.
01:54 And that's how we find the solution to our question!

Step-by-step written solution

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1

Understand the problem

Solve for X:


6x3680+15x=8x+1920 6x-\frac{36}{80}+15x=-8x+\frac{19}{20}

2

Step-by-step solution

Let's solve for x x in the equation 6x3680+15x=8x+1920 6x - \frac{36}{80} + 15x = -8x + \frac{19}{20} .

  • Step 1: Simplify the equation by combining like terms on the left side. We have: 6x+15x3680=8x+1920 6x + 15x - \frac{36}{80} = -8x + \frac{19}{20} This becomes: 21x3680=8x+1920 21x - \frac{36}{80} = -8x + \frac{19}{20}
  • Step 2: Simplify 3680\frac{36}{80} to its simplest form. The greatest common divisor of 36 and 80 is 4: 3680=920 \frac{36}{80} = \frac{9}{20} Thus, the equation is now: 21x920=8x+1920 21x - \frac{9}{20} = -8x + \frac{19}{20}
  • Step 3: To eliminate fractions, multiply the entire equation by 20, the least common denominator, to clear the fractions: 20(21x)20(920)=20(8x)+20(1920) 20(21x) - 20 \left(\frac{9}{20}\right) = 20(-8x) + 20 \left(\frac{19}{20}\right) Simplifying gives: 420x9=160x+19 420x - 9 = -160x + 19
  • Step 4: Combine like terms by adding 160x160x to both sides to collect xx terms on one side: 420x+160x9=19 420x + 160x - 9 = 19 This simplifies to: 580x9=19 580x - 9 = 19
  • Step 5: Isolate xx by adding 9 to both sides: 580x=28 580x = 28
  • Step 6: Divide both sides by 580 to solve for xx: x=28580 x = \frac{28}{580} Which simplifies to: x=7145 x = \frac{7}{145}

Thus, the solution to 6x3680+15x=8x+1920 6x-\frac{36}{80}+15x=-8x+\frac{19}{20} is x=7145 x = \frac{7}{145} .

3

Final Answer

7145 \frac{7}{145}

Practice Quiz

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Solve for X:

\( x - 3 + 5 = 8 - 2 \)

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