If it's not what You are looking for type in the equation solver your own equation and let us solve it.
x in (-oo:+oo)
y = 2*x-(14/7) // - 2*x-(14/7)
y-(2*x)+14/7 = 0
y-2*x+14/7 = 0
y-2*x+2 = 0 // - y+2
-2*x = -(y+2) // : -2
x = (-(y+2))/(-2)
x = (y+2)/2
x = (y+2)/2
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