exam Maths Puzzle Numerical Ability

solve using the addition method,answer must be an ordered pair.
-2x=2y+5
6x+3y=3

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exam Other Question

Two cars leave from a town at the same time traveling in opposite directions. One travels 5 mph faster than the other. In 3 hours, they are 267 miles apart. How many mph is each car traveling? I know Distance = rate * time.
How do i do a proportion and what is a proportion? For example. 7/6, 52/48. If that is a proportion?