If x=3 and y=7, which of the following gives value of 23?
1.) y2/x2.) x2+2y3.) xy4.) y2-2x2
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All answers ▸Solve the following simultaneous equations: a + 3b = 12, 4a - 3b = 18 (KS3 2010 Paper 2)
Solve Simultaneous equations: 3x + 4y = 23 & 2x + 3y = 16
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