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5x + 4y = 24, x + 7y = 11; Prove: y = 1

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Final answer:

To solve the system of equations 5x + 4y = 24 and x + 7y = 11, we can use the method of substitution. Let's solve the second equation for x: x = 11 - 7y.

Step-by-step explanation:

To solve the system of equations 5x + 4y = 24 and x + 7y = 11, we can use the method of substitution.

Let's solve the second equation for x: x = 11 - 7y.

Now substitute this value of x into the first equation:

5(11 - 7y) + 4y = 24. Simplifying, we get 55 - 35y + 4y = 24.

Combining like terms, we have 55 - 31y = 24.

Solving for y, we get y = 1.

Therefore, y = 1 is a solution to the system of equations.

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