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Mathematics
Romero
2 January, 14:38
3x - 5y = 4
- 2x + 6y = 18. what is x and y
+4
Answers (
1
)
Lilianna Gutierrez
2 January, 15:45
0
Let's isolate
x
in the first:
x
=
18
3
-
6
y
3
x
=
6
-
2
y
Now, we replace this found
x
in the second:
2
(
6
-
2
y
)
+
5
y
=
20
12
-
4
y
+
5
y
=
20
12
+
y
=
20
y
=
8
Now, you just replace this
y
=
8
in the isolated
x
above:
x
=
6
-
2
(
8
)
x
=
6
-
16
=
-
10
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