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Solve each system by elemination, 4x+8y=20 and -4x+2y=-30
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Jul 4, 2019
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Solve each system by elemination, 4x+8y=20 and -4x+2y=-30
Mathematics
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Ceottaki
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The sum of the left side of these two equations is equal to the same of the right side is these two equations
4x+8y + (-4x+2y) = 20 + 30
10y =50 ( x is eliminated)
y=5
Take this into the second equation
-4x +2y = 30
-4x + 2*5 = 30
x=-5
So x=-5
y=5
Jimmy Chu
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Jul 11, 2019
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Jimmy Chu
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