book Maths Puzzle Numerical Ability

-(x+6)+4x=3(x-1)+7

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Can someone help me solve this problem?

Add thirty-eight and nine tenths, five and fifty-eight hundredths, seven, and fifteen and eigth tenths.

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Joe start walking due north, Bob starts waling due east. When they stop Bob has walked 1 mile further than Joe and they are 5 miles apart as the crow flies. How far did Bob walk?