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2. 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)
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4 votes
2. 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)

User Kevin Jin
by
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2 Answers

4 votes
A。7x+（-7x）=0，5y+（-2y）=3，3y=3，y=1

7x+5=19，x=2
User Quantumgeek
by
6.0k points
0 votes
its A
minus the two equations so that its becomes 3y=3
y=1
-7X-2x1=-16
X=2
User Gsklee
by
6.1k points
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