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### MEAP Preparation - Grade 7 Mathematics2.67 Simplification of Expressions - III

 Example: (7x-9y+7z) + (7x-9y-7z) - (6x+7y+6z) = _____ ? Solution: Removing the parenthesis and rearranging the terms, the expression = 7x + 9y + 7z + 7x- 9y - 7z - 6x - 7y - 6z = 7x + 7x -6x - 9y - 9y - 7y + 7z - 7z - 6z = 8x-25y-6z Directions: Simplify the following algebraic expressions. Also write at least 10 examples of your own.
 Q 1: (5a-6b+7c) + (9a-7b-7c) - (6a-7b) = _____ ?5a+2b+23c8a-6b8a-2b-2c6a-2b+23c Q 2: (21x-7y) + (7x-9y) - (7x-9y-7z) = _____ ?8x-9y-17z9x-7y+23z21x-7y+7z21x-7y+23z Q 3: (5x-9y+10z) + (15y-7x+9z) - (15y-7x) = _____ ?17x+23y+28z15x-24y+23z-9x-9y-19z5x-9y+19z Q 4: (7a-9b+7c) + (6a-6b+15c) - (7a-17b) = _____ ?8a-6b6a-2b+23c6a-2b+15c6a+2b-23c Q 5: (7x-9y+7z) + (15x-9y+7z) - (7x+6y-9z) = _____ ?23x-22y+24z24x+6y-7z16x+24y+23z15x-24y+23z Q 6: (15x-9y+6z) + (15x-7y+9z) - (7x-9z+6y) = _____ ?23x-7y+24z23x-22y+28z23x+22y+24z17x-23y+28z Q 7: (15x-7y+9z) + (9x-7y+10z) - (7x-9z+9y) = _____ ?17x-23y+28z23x-22y+24z-9x-9y+19z17x-23y-28z Q 8: (7x-7y-9z) + (7x-9y+7z) - (9x-7y+15z) = _____ ?9x+7y-23y9x-7y+23z5x-9y-17z21x-7y+7z Question 9: This question is available to subscribers only! Question 10: This question is available to subscribers only!