exam Maths Puzzle Numerical Ability

Please Help. My Problem is to graph by first solving for y. The equation is x + 2y = 8. I am completely lost here.

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exam Other Question

find the length and width of a square
area=144 square centimeters

perimeter=48 centimeters To determine the number of deer in a game preserve, a conservationist catches 386 deer, tags them and lets them loose. Later, 702 deer are caught; 234 of them are tagged. How many deer are in the preserve?