obsessedwithjah obsessedwithjah

27-02-2017
Mathematics

Answered

what is the solution of the system?

7x+5y=19

-7x-2y=-16

A(2,1)
B(1,2)
C(7,5)
D(-7,-2)

Verified Answer :

10simbahunde 10simbahunde

27-02-2017

its A
minus the two equations so that its becomes 3y=3
y=1
-7X-2x1=-16
X=2

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27-02-2017

A。7x+（-7x）=0，5y+（-2y）=3，3y=3，y=1

7x+5=19，x=2

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