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Rudik [331]
2 years ago
15

WILL GIVE BRAINLIESTTT!!!!!!!!!

Mathematics
2 answers:
lina2011 [118]2 years ago
6 0

Answer:

x-y=12 or x=12+y??????

Step-by-step explanation:

6x+y=30

-2x-5y=18

Add the equations up: 4x-4y=48

Divide by 4

x-4y=12

Divide by 4 again

x-y=12

+y on both sides

x=12+y

(I might be wrong)

AleksAgata [21]2 years ago
3 0

Answer:

x=6; y=-6

Step-by-step explanation:

Unless you're required to use any particular method, let's add the first to twice the second to eliminate x:

6x+y-6x-15y=30+54 \rightarrow -14y=54 \rightarrow y=-6

At this point let's plug this value of y in the first equation and find x:

6x+(-6)=30 \rightarrow x-1=5 \rightarrow x=6

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