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Solve the system of linear equations by graphing. need help on these 2

Solve the system of linear equations by graphing. need help on these 2-example-1
User Neal Davis
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1 Answer

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The solution is at (-5, 0)

see the graph below

Step-by-step explanation:

9) To graph the equatios, we would assign values to x and get corresponding values of y

x + y = -5 ...equation 1

-x + 2y = 5 ...equation 2

when x = -6, -5, -4

when x = -6

-6 + y = -5

y = -5 + 6 = 1

when x = -5

-5 + y = -5

y = -5 + 5

y = 0

when x = -4

-4 + y = -5

y = -5 + 4

y = -1

when x = -6

-(-6) + 2y = 5

6 + 2y = 5

2y = 5 - 6

y = -1/2

when x = -5

-(-5) + 2y = 5

5 + 2y = 5

2y = 5-5

2y = 0

y = 0

when x = -4

-(-4) + 2y = 5

4 + 2y = 5

2y = 5-4

y = 1/2

plotting the graph:

The solution of the graph is at the intersection of both lines.

The solution is at (-5, 0)

Solve the system of linear equations by graphing. need help on these 2-example-1
User Morteza Baghalpoor
by
8.3k points

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