Answer:
4.6x+5y+18
5.10x+21y+6
6.7x+3y+28
Explanation:
Hope this helps :) since u didn't want me to explain. I give u the answer
4. 6x + 5y + 18
5. 10x + 21y + 5
3. 7x + 3y + 28
Just add terms with the same variable like numbers with x, y or no variable at all
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