emilywhite025 emilywhite025

14-02-2018
Mathematics

contestada

x+y=-3 y=2x Solve the linear equation

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PillowFaceMcGee PillowFaceMcGee

14-02-2018

X+Y=-3, Y=2X, so
X+2X=-3
3X=-3 | /3
X=-1

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mysticaldogg mysticaldogg

14-02-2018

x + y = -3
y = 2x

x + y = -3
plug in 2x for y

x + 2x = -3
combine like terms

3x = -3
divide both sides by 3 to isolate x

x = -1

Answer Link

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