Iam doing some algebra homework and we are solving equations by expanding brackets. i was going along fine with the positive numbers however i am a bit stuck on these negative
-(6-7)=2
-10(s+1)=-87
appreciate it if you can me solve these!

answer: t=3

step-by-step explanation:

use an equation of ratios to determine the amount of gas needed to fill the tank.

    0.2             0.8

  =    

288.75             x

                                                              231 gal

so, 0.2x = (0.8)(288.75 gal), and x = = 1155 gal.

                                                                0.2

it would take 1155 gal. to fill the tank.

the cost would be

1155 gal         $3

* = $3465   (answer)

      1           1 gal

hope this you