Answer:
10x + 15y
Step-by-step explanation:
= (7 x + 3y + x + 4y) + (2x + 8y)
= 7 x + x + 2x + 3y + 4y + 8y
= 10x + 15y
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Answer:
10x + 15y
Step-by-step explanation:
= (7 x + 3y + x + 4y) + (2x + 8y)
= 7 x + x + 2x + 3y + 4y + 8y
= 10x + 15y