The linear equation was solved using these steps. linear equation: 1 3 (12x + 15) = 7 step 1: 4x + 5 = 7 step 2: 4x = 2 step 3: x = 1 2

13(12x+15)=7
156x+195=7
156x=7-195
156x=-188
156x/156x=-188/156
x=1.20512820513

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.