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### Grade 6 - Mathematics12.48 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: (7x-7y-9z) + (7x-9y+7z) - (9x-7y+15z) = _____ ?9x-7y+23z5x-9y-17z21x-7y+7z9x+7y-23y Q 2: (15x-7y+6z) + (15x-6z+6y) - (6x-7y+7z) = _____ ?23x-22y+24z23x-22y-24z15x-24y+23z24x+6y-7z Q 3: (15x-9y+6z) + (15x-7y+9z) - (7x-9z+6y) = _____ ?23x-7y+24z23x+22y+24z23x-22y+28z17x-23y+28z Q 4: (5a-6b+7c) + (9a-7b-7c) - (6a-7b) = _____ ?5a+2b+23c8a-6b6a-2b+23c8a-2b-2c Q 5: (5x-9y+10z) + (15y-7x+9z) - (15y-7x) = _____ ?15x-24y+23z17x+23y+28z5x-9y+19z-9x-9y-19z Q 6: (9x-7y+7z) + (9x-7y+9z) - (9x-7y-7z) = _____ ?8x-9y-17z6x-2y+23z9x-7y+23y8x-7y+23y Q 7: (21x-7y) + (7x-9y) - (7x-9y-7z) = _____ ?9x-7y+23z8x-9y-17z21x-7y+7z21x-7y+23z Q 8: (15x-7y+9z) + (9x-7y+10z) - (7x-9z+9y) = _____ ?23x-22y+24z-9x-9y+19z17x-23y-28z17x-23y+28z Question 9: This question is available to subscribers only! Question 10: This question is available to subscribers only!

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