Solve:
-5⁄2 a + 5 = 25
a =

-8

Step-by-step explanation:

First, simplifying a little, we can subtract 5 from both sides to get rid of the +5 on the left side:

-5⁄2 a + 5 = 25 -> -5/2 a = 20

Now, getting rid of the fraction, let's multiply both sides by 2:

-5/2 a = 20 -> -5a = 40

Finally, dividing both sides by -5 will isolate a, giving us the

-5a = 40 -> a = -8

Edit: thanks for correction, sorry about that

a = -8

Step-by-step explanation:

-5⁄2 a + 5 = 25

Subtract 5 from each side

-5⁄2 a + 5-5 = 25-5

-5/2 a = 20

Multiply each side by -2/5

-2/5 * -5/2a = 20 * -2/5

a = -8

answer: 230 miles ( vote ! )

step-by-step explanation:

180.39 minus 17.99 equals 162.4

then divide 162.4 by .80 to get 230