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Y = 5x-3
If you want to solve for X, you have to make it all lonely.
y + 3 = 5x
(y + 3) / 5 = x
TADA
y = 5x3 + 6 is a cubic equation, not a linear equation. Linear equations contain only terms of degree 0 (i.e. constants) and terms of degree 1.
y = 5x3 + 5 is a cubic equation. You cannot solve for x (or y), because there are two variables and only one equation. If you graph this, however, you will see a curve that passes through all possible points that make this equality true.
Slope for the equation y equals 7 is zero.
Since the second equation is already solved for "y", you can replace "y" by "9" in the other equation. Then solve the new equation for "x".
That makes no sense, there is no y in the equation so y cannot equal anything.