1. Solve bysubstitution or elimination method: 3x – 2y = 26 -7x + 3y = -49 2. So

Question

1. Solve bysubstitution or elimination method:

             3x – 2y = 26
            -7x + 3y = -49

2. Solve bysubstitution or elimination method:

               4x – 5y = 14
            -12x + 15y = -42

3. Solve bysubstitution or elimination method:

              -2x + 6y = 19
             10x – 30y = -15

Second part ofproblems:

1. Plot the graph of the equations 2x - 3y = 5 and 4x - 6y =21 and interpret the result.
2. Plot the graph of the equations 4x - 6y = 12 and x - 5y =10 and interpret the result.
3. Plot the graph of the equations 8x - 4y = 12 and -4x + 2y =-6 and interpret the result.

Explanation / Answer

3x - 2y = 26 -7x + 3y = -49 2[3x - 2y = 26] = 6x - 6y = 52 2[-7x + 3y = -49] = -14x + 6y = -98 add the equations together to get -12x = -46 x = (23/6) plug it back into any equation to get y. 3(23/6) - 2y = 26 (23/2) - 2y = 26 2y = (23/2) - 6 y = ((23/2) - 6)/2) = -7.25.

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