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attashe74 [19]
3 years ago
15

PLEASE HELP! 30 POINTS for RIGHT answer!

Mathematics
1 answer:
yulyashka [42]3 years ago
5 0

gg easy

we want to cancel 1 term

first, get them into form am+bn=c where a, b, and c are constants

m-2n=2 is good

m+n=2(n-3) is m+n=2n-6 which is m-n=-6


compare constants

m's have 1 and 1

n's have -2 and -1

let's cancel m's


a. multiply 1st equation by -1

-m+2n=-2

add to 2nd equation


-m+2n=-2

<u>m-n=-6 +</u>

0m+n=-8


n=-8

sub back

m-n=-6

m-(-8)=-6

m+8=-6

m=-14



b. to check

m=-14 and n=-8

m-2n=2

-14-2(-8)=2

-14+16=2

2=2 yep


m-n=-6

-14-(-8)=-6

-14+8=-6

-6=-6 yep


so m=-14 and n=-8 is the solution

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