Solve the following pair of equations by elimination method
15
+
+
7
−
=10
5
+
-
2
−
= -1
Answers
Answered by
1
Answer:
Step-by-step explanation:
3
(
3
x
−
5
y
=
4
)
⇒
9
x
−
15
y
=
12
9x-2y=7
⇒
9
x
−
2
y
=
7
___________
- 13y = 5
x=
−
10
/
13
+
7
9
=
9
/
13
y=-5/13
Substitution,
3x = 5y + 4
3.(5y+4 )= 2y+7
⇒
15
y
+
12
=
2
y
+
7
⇒
13
y
=
−
5
⇒
y
=
−
5
/
13
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