Question
Simplify: 5x + 7y - [(10x + 4y) - (3x + 2y) + 5y]
- 3xSolution
5x + 7y - [(10x + 4y) - (3x + 2y) + 5y] - 3x
= 5x + 7y - [10x + 4y - 3x - 2y + 5y] - 3x
= 5x + 7y - [7x + 7y] - 3x
= 5x + 7y - 7x - 7y - 3x
= -5x
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