Question
Simplify the expression: 3x + 5y - [(7x + 3y) -
(2x + y) + 4y] - xSolution
3x + 5y - [(7x + 3y) - (2x + y) + 4y] - x
= 3x + 5y - [7x + 3y - 2x - y + 4y] - x
= 3x + 5y - [5x + 6y] - x
= 3x + 5y - 5x - 6y - x
= -3x - y
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Consider the correctly matched pairs:
