Equation with 2 Variables | Mathematics | Page 1

cinder apex Dec 3, 2023, 3:46 PM

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I have an equation eith 2 variables
| -27a+9b=-7.2
||-8a+4b=-7.2
What is the most effektive way of solving this equation?

limpid spindleBOT Dec 3, 2023, 3:46 PM

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celest siren Dec 3, 2023, 5:46 PM

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u have that the right hand sides in I and II have the same absolute value

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so u can say:

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-(-27a+9b)=-8a+4b

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27a-9b=4b-8a

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then add 9b on both sides

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u get 27a=13b-8a

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add 8a

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both sides

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35a=13b

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b=(35/13)a

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put that back in I

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u get (315/13)*a-27a=-7.2

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after simplifying we get a/13=1/5 which means a=13/5

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put that back in II and get 4b=72/10 + 208/10

#Equation with 2 Variables