For the first one, add y to both sides, making the equation 2x=4y. Then, divide both sides by 2, making the equation x=2y, the
final answer. For the second one (2x+3y=12), divide both sides by 2,
making it (x+3y=6). Then divide both sides by 3, making the equation
(x+y=2). That's the second answer.
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