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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