Add the following (10x -2y) + (25y- 8x)+(5x-9y
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(10x - 2y) + (25y - 8x) + (5x - 9y)
= 10x - 2y + 25y - 8x + 5x - 9y (open the brackets)
= 10x - 8x + 5x - 2y + 25y - 9y (bring the like terms together)
= 2x + 5x + 23y - 9y (simplify)
= 7x + 14y
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