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Online Quiz (Worksheet A B C D)

Questions Per Quiz = 2 4 6 8 10

Grade 7 - Mathematics
6.28 Solution of Simple Equations - VIII

Example:
Solve the equation 3x + 4(x-2) = 2(3x+4).
Solution:
Here the parenthesis in the equation should be removed first
3x + 4(x-2) = 2(3x+4)
3x + 4x - 8 = 6x + 8
7x - 8 = 6x + 8
Transposing 6x to L.H.S. and -8 to R.H.S., we have
7x - 6x = 8 + 8
x = 16

Verification:
Substituting x = 16 in the equation
L.H.S. 3x + 4(x-2) = 3*16 + 4(16-2)
48 + 56 = 104
R.H.S. 2(3x+4) = 2(3*16 + 4) = 2(48+4)
2(52) = 104
\ L.H.S. = R.H.S.
\ x = 16 is the solution.
Answer: 16


Directions: Solve the following equations. Also write at least five examples of your own.
Q 1: Solve the euqation 5x - 8(x-2) = 4(2x+4).
3
0
6
1

Q 2: Solve the euqation 6x + 6(2x+3) = 2(3x+2).
16
15
9
-7/6

Q 3: Solve the euqation 2x - 3(x-4) = 2(3x-8).
4
7
3
6

Q 4: Solve the euqation 4x + 5(x-2) = 2(4x+5).
16
15
10
20

Question 5: This question is available to subscribers only!

Question 6: This question is available to subscribers only!


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