SOLUTION: One day Tom buys an electric drill when the shop offers a 20% discount. The next day jake buys and identical drill but the discount is then 25%. If tom paid $4 more than Jake,what

Algebra ->  Percentages: Solvers, Trainers, Word Problems and pie charts -> SOLUTION: One day Tom buys an electric drill when the shop offers a 20% discount. The next day jake buys and identical drill but the discount is then 25%. If tom paid $4 more than Jake,what       Log On


   



Question 678678: One day Tom buys an electric drill when the shop offers a 20% discount. The next day jake buys and identical drill but the discount is then 25%. If tom paid $4 more than Jake,what was the orginal price of the drill?
Found 2 solutions by rm29924, josmiceli:
Answer by rm29924(97) About Me  (Show Source):
You can put this solution on YOUR website!
Let X = the original cost of the drill
Tom paid .20X
Jake paid .25X
what Jake paid is equal to what Tom paid plus 4 dollars
.25X=.20x+4
subtract .20x from both sides
.05X=4
divide both sides by .05 to get X by itself
X=80
The original price of the drill was 80 dollars.

Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let +x+ = the original price of the drill
given:
+x+-+.2x+=+x+-+.25x+%2B+4+
+.8x+=+.75x+%2B+4+
+.05x+=+4+
+x+=+4%2F.05+
+x+=+80+
The original pice was $80
check:
+x+-+.2x+=+x+-+.25x+%2B+4+
+80+-+.2%2A80+=+80+-+.25%2A80+%2B+4+
+80+-+16+=+80+-+20+%2B+4+
+64+=+64+
OK