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OpenStudy (anonymous):
first rearrange first equation to get y in terms of x: 2x = y + 5 y = 2x - 5 Now substitute y = 2x-5 in second equation: x + 2(2x-5) = 15 x + 4x - 10 = 15 5x = 15+10 = 25 x = 5 Now plug x = 5 into the first equation to find value of y: 2(5) - y = 5 y = 10-5 = 5 solution set is x=5,y=5
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