If a + b = -1 and x + y + z = 2, what is 7a + 7b +6z +6x + 6y?

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note: the best i know.

. + λrh() e 1 1 2 4 4 4 4 4 3 4 4 4 4 4 + th−1(− s(x)2 dx ω + λrh−1() e 2 1 2 4 4

step-by-step explanation: