3 years ago

Answer and explain I’ll mark brainliest please help!!!!!

Mathematics

1 answer:

Papessa [141]3 years ago

8 0

Answer:

230 were sold at the door

170 were sold in advance

Step-by-step explanation:

x=at door y=in advance

x+y=400

3x+2y=1030

y=-x+400

2y=-3x+1030

y=-3/2x+515

-x+400=-3/2x+515

x=230 y=170

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