Determine 8x to the power x if 9 to the power x+2=240+9 to the power x
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9^(x + 2) = 240 + 9^x
9^x.9² = 240 + 9^x
81.9^x = 240 + 9^x
9^x(81 - 1) = 240
9^x .80 = 240
9^x = 3
3^2x = 3¹
[ use, x^m = x^n then, m = n ]
2x = 1
x = 1/2
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