Simplify and Solve: Finding X in 8(x+3) - 1 + 4x = 8(x+3) - 5(x-4)

Solve for X:

8(x+3)1+4x=8(x+3)5(x4) 8(x+3)-1+4x=8(x+3)-5(x-4)

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Solve
00:04 Subtract the common term to simplify
00:21 Open brackets properly, multiply by each factor
00:33 Arrange the equation so that one side has only the unknown X
00:49 Group like terms
00:57 Isolate X
01:02 And this is the solution to the question

Step-by-step written solution

Follow each step carefully to understand the complete solution
1

Understand the problem

Solve for X:

8(x+3)1+4x=8(x+3)5(x4) 8(x+3)-1+4x=8(x+3)-5(x-4)

2

Step-by-step solution

To solve for x x in the equation 8(x+3)1+4x=8(x+3)5(x4) 8(x+3)-1+4x=8(x+3)-5(x-4) , follow these steps:

  • Step 1: Expand the expressions on both sides of the equation.
    Open up the terms: 8(x+3) 8(x + 3) becomes 8x+24 8x + 24 , and 5(x4) 5(x - 4) becomes 5x20 5x - 20 .

  • Step 2: Simplify each side.
    Starting with the left-hand side:
    8(x+3)1+4x 8(x + 3) - 1 + 4x simplifies to 8x+241+4x=12x+23 8x + 24 - 1 + 4x = 12x + 23 .
    For the right-hand side:
    8(x+3)5(x4) 8(x + 3) - 5(x - 4) simplifies to 8x+245x+20=3x+44 8x + 24 - 5x + 20 = 3x + 44 .

  • Step 3: Set the simplified expressions equal and solve for x x .
    This gives you the equation: 12x+23=3x+44 12x + 23 = 3x + 44 .

  • Step 4: Isolate x x .
    Subtract 3x 3x from both sides:
    12x3x+23=44 12x - 3x + 23 = 44 simplifies to 9x+23=44 9x + 23 = 44 .
    Subtract 23 from both sides to isolate the term with x x :
    9x=21 9x = 21 .

  • Step 5: Solve for x x .
    Divide both sides by 9:
    x=219=73 x = \frac{21}{9} = \frac{7}{3} .

Therefore, the solution to the equation is x=73 x = \frac{7}{3} .

3

Final Answer

73 \frac{7}{3}

Practice Quiz

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Solve for x:

\( 2(4-x)=8 \)

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