do you mean y = 2x + 8 ?
the inverse is y = (x - 8)/2
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If y is equal to -4 there is not a multiplicative inverse. If y is different than -4 the inverse is: -1/(4+y)
7x2 + y
The general multiplicative inverse of xy is y-1x-1. The additive inverse is -xy
y = 3x + 2 y-2 = 3x x = (y-2)/3 So the inverse is (x-2)/3
if y = 2x then x = log2 y