Lets simplify step by step
3x+2.50x-1x+3y+2.50y-1y
= 3x+2.5x+-x+3y+2.5y+-y
Combine like terms
3x+2.5x+-x+3y+2.5y+-y
= (3x+2.5x+-x) + ( 3y+2.5+-y)
= 4.5x + 4.5y
I hope that's help ! Have a nice day .
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