Q: What is the solution to the equation x plus y equals two?

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One equation with two unknowns usually does not have a solution.

It will have two solutions because its a quadratic equation: x = -8.472135955 or x = 0.472135955

Solving equations in two unknowns requires two independent equations. Since you have only one equation there is no solution.

This is a linear equation in two variables and the coordinates of each and every point on the line that it describes is a solution. A single linear equation does not have an "answer".

is an equation of a straight line. It cannot be solved since the solution of an equation with two unknowns (x and y) requires 2 independent equations.

Related questions

One equation with two unknowns usually does not have a solution.

It will have two solutions because its a quadratic equation: x = -8.472135955 or x = 0.472135955

Solving equations in two unknowns requires two independent equations. Since you have only one equation there is no solution.

You have one linear equation in two unknown variables: A and n. There can be no solution.

This is a linear equation in two variables and the coordinates of each and every point on the line that it describes is a solution. A single linear equation does not have an "answer".

is an equation of a straight line. It cannot be solved since the solution of an equation with two unknowns (x and y) requires 2 independent equations.

Solving equations in two unknowns requires two independent equations. Since you have only one equation there is no solution.

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There is no such pair. The solution to equation 1 and equation 2 is x = 1, y = 1. The solution to equation 2 and equation 3 is x = 1, y = 1. And the solution to equation 1 and equation 3 is any point on the line 3x + 2y = 5 - an infinite number of solutions. The fact that the determinant for equations 1 and 3 is zero (or that they are not independent) does not mean that there is no solution. It means that there is no UNIQUE solution. In this particular case, the two equations are equivalent and so have an infinite number of solutions.

There are two equations in the question, not one. They are the equations of intersected lines, and their point of intersection is their common solution.