Solve the following system of equations

-4x + 9y = -16

2x - 5y = 8

Answer

x=

y=

Thank you for the opportunity to help you with your question!

x=4

y=0

method of solving

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x = (8+ 5y)/2

-4*(8+5y)/2 +9y=-16

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-16-10y+9y=-16

x=(8+5y)/2

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-16-y=-16

-y=-16+16 -> y=0

x=(8+5*0)/2 ->x=4

Let's check

-4*4 + 9*0 = -16 -16=-16

2*4 - 5*0 = 8 8=8

is it fine method? or you need to do it with elimination and multiplication method? I can do it in different ways

No you were right. Thanks

Here is method of multiplication and adding

(2x - 5y = 8) * 2

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-4x+9y=-16

4x - 10y=16

-4x+9y + 4x - 10y = -16 + 16

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Same as 1st method

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