-4x+y=6 -5x-y=21 solve by substiution

55

Step-by-step explanation:

55 is your answer

Step-by-step explanation:

Subtract

2

y

from both sides of the equation.

x

=

12

−

2

y

−

x

=

−

y

−

6

Replace all occurrences of

x

with

12

−

2

y

in each equation.

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−

12

+

2

y

=

−

y

−

6

x

=

12

−

2

y

Solve for

y

in the first equation.

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y

=

2

x

=

12

−

2

y

Replace all occurrences of

y

with

2

in each equation.

Tap for more steps...

x

=

8

y

=

2

The solution to the system is the complete set of ordered pairs that are valid solutions.

(

8

,

2

)

The result can be shown in multiple forms.

Point Form:

(

8

,

2

)

Equation Form:

x

=

8

,

y

=

2

i would say c is the best answer, hope it's right!

good luck! =)

cutie~