Solving equations in two unknowns requires two independent equations. Since you have only one equation there is no solution.
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-4 + 2y = 242y + 4 = 242y + 4 - 4 = 24 - 42y + 4 - 4 = 24 - 42y = 24 - 42y = 202y/2 = 20/22y/2 = 20/2y = 20/2y = 10Therefore the y-intercept is at (0,10) or has a value of 10
Inconsistent linear equations in two variables.
When x = -2 then y = 4 which is the common point of intersection of the two equations.
These are two expressions, not equations. Expressions do not have solutions, only equations do. NB equations include the equals sign.
Two equations: a linear one in y and a quadratic in x.