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3 years ago

8

Use The elimination method a). 2x + 3y = 5 -3 + 2y = -14

1 answer:

ololo11 [35]3 years ago

8 0

2x+3y=5
-3x+2y=-14

3( 2x+3y=5)
2 (-3x+2y=-14)
--------------------
13y=-13 ⇒y=-13/13=-1

2( 2x+3y=5)
-3(-3x+2y=-14)
---------------------
13x = 52 ⇒x=52/13=4

Answer: x=4; y=-1

To check:
2x+3y=5
2*4+3*(-1)=8-3=5

-3x+2y=-14
-3*4+2*-1=-12-2=-14

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