16 because 2•0 is 0. 8-0 is 8 and 2(8) is 16
Answer:
i'd say do it with division what equals 31? im not going to say the staright up answer
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He earns 200 dollars per day.
He earns 75 dollars per room.
He can paint about 16 rooms in 6 days.

notice, that, pure juice is 100% juice, dohhh, thus 100/100 = 1.00
50% is 50/100 or 0.50 in decimal format
so..... whatever those two quantities amount to, that is, the 50% and pure juice, or (4)(0.50) + (x)(1.00)
they will equal the mixture desired 60% juice, or 0.60, namely (4+x)(0.60)
thus (4)(0.50) + (x)(1.00) = (4+x)(0.60)
solve for "x"
It means that 15 times another number equals to your equation.