Question

Solve by the substitution method

2x + 9y=41
- 4x + y=13

Answer 1

x=-2, y=5. (-2, 5).

Explanation:

2x+9y=41

-4x+y=13

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2(2x+9y)=2(41)

-4x+y=13

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4x+18y=82

-4x+y=13

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19y=95

y=95/19

y=5

2x+9(5)=41

2x+45=41

2x=41-45

2x=-4

x=-4/2=-2