Help.... solve, using linear combination. 3x - y = 4 2x + y = 6 a. ( 3, 0 ) b. ( 0, -4 ) c. ( 2, 2, ) d. ( -1, -7 )

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asked Apr 22, 2019 48.8k views

1 Answer

Paul Kononenko · Answer 1 · 2019-04-28T15:53:11+0000

add the 2 equations
3x+2x-y+y=4+6
5x=10
x=2
now that we know x we can sub it back in one of the fisrt equations that we had
3×(2)-y=4
6-4=y
y=2
so the answer is C

Help.... solve, using linear combination. 3x - y = 4 2x + y = 6 a. ( 3, 0 ) b. ( 0, -4 ) c. ( 2, 2, ) d. ( -1, -7 )

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