Question
Simplity:
[7 - 2x + 5y - (x - y)] - (5x + 3y - 7)
[7 - 2x + 5y - (x - y)] - (5x + 3y - 7)
✓
Answer
[7 - 2x + 5y - (x - y)] - (5x + 3y - 7)
= (7 - 2x + 5y - x + y) - (5x + 3y - 7)
= 7 - 2x + 5y - x + y - 5x - 3y + 7
= 7 + 7 - 2x - x - 5x + 5y + y - 3y
= 14 - 8x + 3y
= (7 - 2x + 5y - x + y) - (5x + 3y - 7)
= 7 - 2x + 5y - x + y - 5x - 3y + 7
= 7 + 7 - 2x - x - 5x + 5y + y - 3y
= 14 - 8x + 3y
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