3 years ago

-7x + y = -19 –2x+3y=-19

Mathematics

1 answer:

ZanzabumX [31]3 years ago

6 0

Answer:x=3,y=-5

Step-by-step explanation:

-7x+y=-19...(1)

-2x+3y=-19...(2)

Subject of formula from (1)

Y=-19+7x....(3)

Substitute (3) into (2)

-2x+3(-19+7x)=-19

-2x-57+21x=-19

Collect like terms

-2x+21x=-19+57

19x=38

X=2

Substitute x=2 to equation (3)

Y=-19+7(2)

Y=-19+14

Y=-5

X=2 and y=-5

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