exam Maths Puzzle Numerical Ability

At 9am a truck leaves the truck yard and travels west at a rate of 45 mi/hr. Two hours later, a second truck leaves along the same route, traveling at 75 mi./hr/ When will the second truck catch up to the first?

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exam Other Question

One number is 3 less than another. If 7 times the smaller number minus 3 times the larger number is 7, find the two numbers. I am having problems with the following system of equations. The elimination method is supposed to be used, and the solution is to be in the form of integers or fractions.

.03x-0.2y=4
.04x+0.5y=63/19

Thanks!

Stephanie