giasienna14 giasienna14

02-02-2021
Mathematics

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this is solving systems of equations by elimination, though I am a bit confused

this is solving systems of equations by elimination though I am a bit confused class=

Respuesta :

thebecks thebecks

02-02-2021

Answer:

x=7

y=-1

Step-by-step explanation:

4x+8y=20

-4x+2y=-30

8y=20-4x

y=(20-4x)/8

substitute

-4x+2(20-4x)/8=-30

-4x+(40-8x)/8=-30

-4x+5-x=-30

-5x=-35

x=7

4(7)+8y=20

8y=-8

y=-1

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