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3 years ago

6x + 3y = 12 6x - 5y = 60

2 answers:

5 0

$6x + 3y = 12\\
6x - 5y = 60\\\\
6x + 3y = 12\\
-6x + 5y = -60\\
--------\\
8y=-48\\
y=-6\\\\
6x+3\cdot(-6)=12\\
6x-18=12\\
6x=30\\
x=5

$

brilliants [131]3 years ago

4 0

6x+3y=12. so... 6x=12-3y.

6x-5y=60, so... 6x=60+5y

As 6x=6x

12-3y=60+5y

12-60=8y

8y=-48

So y=-48/8=-6

When y=-6,

6x-5(-6)=60

6x+30=60

6x=30

Therefore x=5.

So x=5 and y=-6.

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Step-by-step explanation:

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2 years ago

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