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25 votes
Solve by substitution.
x + 3y = -2
1-3x + y = 6

User Sharina
by
8.3k points

1 Answer

3 votes
Step-by-step explanation:
3
x
+
y
=
2

x

3
y
=
6


6

3
y
=
x
Substitute this equation into the other system wherever you see
x
.
3
(

6

3
y
)
+
y
=
6
Distribute
3
onto
(

6

3
y
)

18

9
y
+
y
=
2
Combine alike terms

8
y
=
20
Divide to solve for
y

8
y

8
=
20

8

y
=

20
8
Then solve for
x
using the value of
y
.

x

60
8
=
6
x
=

108
8
y
=

20
8
User Tony Isaac
by
7.6k points

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