(a) solve simultaneous equations 27^y=9^3x+2 and 2log3 x=2log3 y+2
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Originally Posted by outlaw (a) solve simultaneous equations 27^y=9^3x+2 and 2log3 x=2log3 y+2 x = y+2 y = x - 2 27^(x-2) = 9^(3x+2) (3^3)^(x-2) = (3^2)^(3x+2) 3^(3x-6) = 3^(6x+4) 6x + 4 = 3x - 6 3x = -10 x = -10/3 y = -16/3 Assuming that you were too lazy to use brackets and that's what you meant :P
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