chitsuii  Jul 1, 2018

This is actually a very easy question.


Multiply -5x+10y=10 by -2 because we want something common with the first equation and negative because we want to eliminate it later.


We get 10x-20y=-20


Then we cross out the 20y


And we are left with: -9x=22 and 10x=-20


Then we add them(both sides) and get x=2


And then we substitute it in whichever equation you want to





Add 18 on both sides


Then divide 20 on both sides



So we get x=2 and y=2!


Then you can substitute them back into both equations and check your work but I don't have time so bye. Hope that helps!! 

HelpPls  Jul 3, 2018

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