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Online Quiz (Worksheet A B C D)

Questions Per Quiz = 2 4 6 8 10

Grade 7 - Mathematics
6.27 Solution of Simple Equations - VII

Example: Solve the equation 3x + 4(x-1) = 2.
Solution:
If there are parenthesis in the equation they should be removed first. The equation can be written as:
3x + 4(x-1) = 2
3x + 4x - 4 = 2
7x - 4 = 2
7x = 2 + 4
7x = 6
x = 6/7

Verification:
Substituting x = 6/7 in the equation
L.H.S. 3x + 4(x-1) 3 * 6/7 + 4(6/7 - 1) = 18/7 + 4[(6-7)/7] = 18/7 + 4(-1)/7
18/7 - 4/7 = (18-4)/7 = 14/7 = 2 = R.H.S.
\ x = 6/7 is the solution.


Directions: Solve the following linear equations. Also write at least ten examples of your own.
Q 1: Solve the equation 9x + 2(x-5) = 6.
11/16
16/11
5/16
9

Q 2: Solve the equation 3x + 8(x-2) = 9.
25/11
15/11
16/5
12/13

Q 3: Solve the equation 2x + 6(x-4) = 9.
46/5
33/9
33/8
15/7

Q 4: Solve the equation 5x + 4(x-3) = 100.
22/9
5/9
9/12
112/9

Question 5: This question is available to subscribers only!

Question 6: This question is available to subscribers only!


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