483,858 views
38 votes
38 votes
-4x+y=6 -5x-y=21 solve by substiution

User Jack Daniel
by
3.3k points

2 Answers

14 votes
14 votes

Answer:

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.

Tap for more steps...

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

User Aizaz
by
3.0k points
11 votes
11 votes

Answer:

55

Explanation:

55 is your answer

User Josue
by
3.0k points