kimbriea kimbriea

20-04-2015
Mathematics

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how to solve 2x-y=17;x-y=10

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julxaaaa julxaaaa

20-04-2015

the answer is that y is equal to -3 and x is equal to 7
2x-y=17
-2(x-y)=10 )
--------------
2x-y=17
-2x+2y=-20
----------------
y=-3

x-y=10
x-(-3)=10
x+3=10
-3 -3
----------
x=7

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