Solve the Linear Equation: Finding Variable 'a' in '8a + 2(3a - 7) = 0'

8a+2(3a7)=0 8a+2(3a-7)=0

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Step-by-step video solution

Watch the teacher solve the problem with clear explanations
00:00 Solve
00:03 Open parentheses properly, multiply by each factor
00:14 Collect terms
00:20 Arrange the equation so that only the unknown A is on one side
00:26 Isolate A
00:34 And this is the solution to the question

Step-by-step written solution

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1

Understand the problem

8a+2(3a7)=0 8a+2(3a-7)=0

2

Step-by-step solution

To solve the linear equation 8a+2(3a7)=0 8a + 2(3a - 7) = 0 , we'll proceed with the following steps:

Step 1: Apply the Distributive Property.
The equation given is 8a+2(3a7)=0 8a + 2(3a - 7) = 0 .
First, distribute the 2 across the terms inside the parenthesis:
2(3a7)=2×3a+2×(7)=6a14 2(3a - 7) = 2 \times 3a + 2 \times (-7) = 6a - 14 .
By substituting this back into the equation, we have:
8a+6a14=0 8a + 6a - 14 = 0 .

Step 2: Combine Like Terms.
Now, combine the terms containing a a :
8a+6a=14a 8a + 6a = 14a .
The equation now becomes:
14a14=0 14a - 14 = 0 .

Step 3: Isolate the Variable.
Add 14 to both sides of the equation to isolate terms with a a :
14a14+14=0+14 14a - 14 + 14 = 0 + 14 , which simplifies to:
14a=14 14a = 14 .
Next, divide both sides by 14 to solve for a a :
a=1414=1 a = \frac{14}{14} = 1 .

Therefore, the solution to the equation is a=1 a = 1 .

3

Final Answer

a=1 a=1

Practice Quiz

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Determine the value of \( x \):

\( 2(x+4)+8=0 \)

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