Solve for x. 4(5x−20)=−20 need asap

4(5x-20)=-20
20x-80=-20
20x=60
x=3

Ok here is how you do it 
4(5x-20)=-20
20x-80=-20
20x-80+80=60
20x=60
x=3

Idon’t know actually i’m in 5th grade and don’t know

At a constant it will take one hour to travel 32 mi.at that speed it will take 1/2 hr to travel the remaining 16 mi.it will take 1+1/2 hr to travel the 48mi @ 32mph.so 1 hr = 60 min& 1/2 hr = 30 min1+1/2 hr = 90 min.there are 60s in each 90 × 60 = 3600 seconds.the real question seriously is he why are they driving so slow? ! lol.