Find the system if equations it has to be in x and y coordinate

Solution:

Step-1: Multiply 2 to an equation such that a term is equivalent.

         5x + 4y = 21

              5x + 4y = 21

              5x + 4y = 21

Step-2: Subtract the equations to remove the y variable.

        -5x - 4y = -21

Step-3: Divide to obtain the x variable.

Step-4: Substitute the value of x into any equation to obtain the value of y.

Hence, the solution to your question is (9,-6).

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step-by-step explanation: