Answer:
Explanation:
1.) (4x + 3y) + (2x-y) = 6x +2y --> 2(3x+1)
2.) (4x + 5y) = ? + (x+4y)
(4x+5y) - (x+4y) = ? ---> 4x + 5y - x - 4x = (3x + y)
3.) (2x - y) + (3x + y) = 5x
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