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2x - 3y = -4

x + 4y = -9

from the second equation x = -9-4y , substitute it in the first equation.

2(-9-4y)- 3y= -4

-18-8y-3y = -4

-18-11y = -4

-11y = -4+18

-11y = 14

y = -14/11

now, solve for x :

x = -9-4y

x = -9-4(-14/11)

x = -43/11

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13y ago
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clumsz

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3y ago

X+3y=4 -x+4y=10

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Q: Solve this system of equation using substitution 2x -3y equals -4 and x plus 4y equals -9?
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