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3 years ago

X^2+y^2=49 , y=7-x solve it in substitution

Mathematics

1 answer:

pashok25 [27]3 years ago

3 0

X^2+(7-x)^2=49
x^2+x^2-14x+49=49
2x^2-14x=0
2x(x-7)=0
x=0, x=7

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