Consider f(x) = 1.8x – 10 and g(x) = −4. select the equation that can be used to find the input value at which f (x ) = g (x ), and then use that equation to find the input, or x -value. 1.8x – 10 = –4; x = 1.8x = –4; x = 1.8x – 10 = –4; x = –4 = x