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Online Quiz (Worksheet A B C D)

Questions Per Quiz = 2 4 6 8 10

Grade 8 - Mathematics
1.6 Solution of Simple Equations - VI

Method to solve for the unknown variable:
  1. First isolate the variable
  2. Perform order of operations, multiplication and division are completed before addition and subtraction.
Example:
Solve the equation: -7+6x = 5+2x
Solution:
Subtracting 2x both sides of the equation we have:
-7 + 6x - 2x = 5 + 2x - 2x
-7 + 4x = 5
And adding 7 both sides of the equation we have:
-7 + 4x + 7 = 5 + 7
4x = 12
Dividing both sides of the equation by 4 we have:
x = 12/4
x = 3

Verification:
Substituting x = 3 in the equation
L.H.S. = -7+6x = -7 + 6*3 = -7 + 18 = 11
R.H.S. = 5 + 2x = 5 + 2*3 = 5 + 6 = 11
\ L.H.S. = R.H.S.
\ x = 3 is the solution.
Answer: 3


Directions: Solve the following equations Also write at least ten examples of your own.
Q 1: (-7x) = 3x - 30
Answer:

Q 2: 7x + 13 = 9x + 1
Answer:

Q 3: 4x + 12 = 36 - 2x
Answer:

Q 4: 4x + 4 = 6x + 2
Answer:

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Question 6: This question is available to subscribers only!


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