Please help me with these 3 questions!

1) -4x-6x+8x=2-6

-2x=-4

x=-2

2)3x-4x=12-15

-1x=-3

x=3

3) 12.5x+10.25=680-410

22.75x=270

x=11.86

step-by-step explanation:

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if you are looking for the unit rate then the answer would be 9 because unit rate is distance divided by time.

step-by-step explanation: