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Which is the solution of (x+3y=9) and (x+y=5)?

Answer and explanation

Correct answer: ( (3,2) )

A solution of two linear equations is an ordered pair whose first number is the value of x and whose second number is the value of y. The same pair must make both equations true at the same time. This is also the point where the two corresponding lines intersect on a graph.

For option A, take x=3 and y=2. In the first equation, x+3y becomes 3+3(2)=3+6=9, so it is satisfied. In the second equation, x+y becomes 3+2=5, so that equation is also satisfied. Therefore, the common solution is (3,2). A pair that satisfies only one equation would not be a solution of the pair.

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Linear EquationsSolution CheckGraphical SolutionEasy

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