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How do you solve this system by elimination? -3x+4y=12 2x+y=-8 I dont know how to solve it.
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How do you solve this system by elimination? -3x+4y=12 2x+y=-8 I dont know how to solve it.
asked
Nov 17, 2018
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How do you solve this system by elimination?
-3x+4y=12
2x+y=-8
I dont know how to solve it.
Mathematics
high-school
Juri Sinitson
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Juri Sinitson
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-3x+4y=12 ...(1)
2x+y=-8 ...(2)
multiply (2)by -4
-8x-4y=32 ...(3)
add (1) and (3)
-3x+4y-8x-4y=12+32
-11x=44
x=44/-11=-4
from (2)
2(-4)+y=-8
y=-8+8=0
Reverend Bubbles
answered
Nov 23, 2018
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Reverend Bubbles
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