Problem

6. Solve this linear system by graphing. Show ALL your work. (4 marks) \[ 2 x-5 y=10 \quad 5 y+6 x=30 \] What is the solution? Verify your solution by checking. Show your work.

Solution

Step 1 :Rewrite both equations in slope-intercept form (y = mx + b):

Step 2 :\(y = \frac{2}{5}x - 2\)

Step 3 :\(y = 6 - \frac{6}{5}x\)

Step 4 :Find the point of intersection, which is the solution to the system:

Step 5 :\(x = 5, y = 0\)

Step 6 :Verify the solution by plugging the values of x and y back into the original equations:

Step 7 :For equation 1: \(2x - 5y = 10\)

Step 8 :\(2(5) - 5(0) = 10\)

Step 9 :\(10 = 10\) (True)

Step 10 :For equation 2: \(5y + 6x = 30\)

Step 11 :\(5(0) + 6(5) = 30\)

Step 12 :\(30 = 30\) (True)

Step 13 :\(\boxed{(x, y) = (5, 0)}\)

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Source: https://solvelyapp.com/problems/17110/

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