How do I solve system of equations substitution method??!!?!???

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07-02-2019
Mathematics

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How do I solve system of equations substitution method??!!?!???

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noxes noxes · Answer 1 · 2019-02-08T00:12:53+01:00

noxes noxes

08-02-2019

for example:

x+2y=7
6x+7y=2
__________

x=7-2y *
6*(7-2y)+7y=2 **

__________

x=7-2y
42-12y+7y=2
__________

x=7-2y
-5y=-40
__________

x=7-2y
y=8

x=-9

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