I’m not for sure but I think it’s B
On her map 1 inch is equal to 20 miles.
5x=100
divide both sides by 5
x=20
5 is for the 5 inches.
x is for the unknown.
100 is the 100 miles between the cities.
So the scale 1:20
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➷ x + 1 = -10
- 1 from both sides to isolate x
x = -10 - 1
Solve:
x = -11
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