Answer:
19 - 2 = x The X will be 17
I have x candy, but my friend only have 2 candy which is less than me, but our total is 19 candy. How many candy do I have?
You could make similar story if you want to. But the X is 17.
Answer:
1 * -2, 7 - 9, and 2^2 - 2 * 3
<h2>A can complete the work in 7*6 hrs = 42 hrs.
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</h2><h2>A can complete in 1 hr = 1/42 part.
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</h2><h2>B can complete the work in 7*8 hr = 56 hrs.
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</h2><h2>A&B together do in 1 hr = 1/42 + 1/56 = 7/168 = 1/24 part. So they will do in 8 hrs = 8*1/24 = 1/3 part.
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</h2><h2>Hence they need 1÷1/3 = 3 days to complete the work.</h2>