NEED HELP NOW! Use the substitution method to solve the system of equations. choose the correct ordered pair. x+y=12 -x=-y-10

Mathematics

2 answers:

Anni [7]3 years ago

7 0

$x+y=12\\y=x+10\\\\x+(x+10)=12\\2x+10=12\\2x=2\\x=1\\\\y = x+10\\y=1+10\\y=11\\\\x+y=12\\1+11=12\\12=12\\\\x=1\\y=11$

8090 [49]3 years ago

6 0

-x=-y-10 is the same thing as x=y+10. because u can add x to both sides and add y and 10 to bith sides to get rid of the negative. now u can substitute x in ur first equation w ur new positive equation. u should have y+10+y=12. add ur y's and numbers. u shoukd get 2y= 2. divide both sides by 2. and your answer should be y=1. hope this helps

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