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Solve the following simultaneous equations: 6j+4k=40; 7j-3k=-7

j = 2, k = 7

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c is a positive integer. Prove that (6c^3+30c) / ( 3c^2 +15) is an even number.

1: x = 2, 2: y = x + 5 -> Solve this pair of simultaneous equations.

How do I solve the equation x^2 + 6 = -5x

2X-6=4

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