Tìm các chữ số a, b , c biết a/-5=b/-7=c/2 và a-b+c=-28

asked Mar 27, 2022 169k views

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Answer:

a=35,b=49,c=-14

Explanation:

$(a)/(-5) =(b)/(-7) =(c)/(2) =r(say)\\a=-5r,b=-7r,c=2r\\a-b+c=-5r+7r+2r=4r=-28\\r=(-28)/(4)=-7\\a=-5 * -7=35\\b=-7 * -7=49\\c=2 * -7=-14$

Thetacom answered Apr 1, 2022

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