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OpenStudy (anonymous):
Need help with system: -7x-8y=9 -4x+9y=-22
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OpenStudy (radar):
4(-7x-8y=9) = -28x-32y=36 7(-4x+9y=-22) = -28x+63y=-154 Subtract: 0x-95y=190 Solve for y: y=-2 Substitute -2 for y in original equation and solve for x.
OpenStudy (anonymous):
thanks
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