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14-11-2018
Mathematics

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2x + 5y= 18 4x + 20y= -36 Solve and Explain first to get right gets brainliest

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wghitustl wghitustl

14-11-2018

because 4x+20y=-36,so ( 4x+20y)/2=2x+10y=-18

(2x+10y)-(2x+5y)=-18-18

5y=-36

then y=-7.2

because 2x=18-5y

so x=(18-5y)/2=(18-5*(-7.2)）/2=27

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