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36 votes
36 votes
2x-5y= -19
-3x+y=9
solve by substitution

User Poulami
by
2.9k points

1 Answer

11 votes
11 votes

Answer: (-2,3)

Explanation:

2x-5y=-19 (1)

-3x+y=9 (2)

2x-5y=-19 (3)

y=3x+9 (4)

2x-5(3x+9)=-19

2x-15x-45=-19

-13x=-19+45

-13x=26

Divide both parts of the equation by -13:

x=-2

Substitute the value of x=-2 into equation (4):

y=3(-2)+9

y=-6+9

y=3

Thus, (-2,3)

User Alexandre Victoor
by
2.6k points