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Byju's Answer
Standard X
Mathematics
Cross-Multiplication Method of Finding Solution of a Pair of Linear Equations
Solve the fol...
Question
Solve the following systems of equations by the method of cross-multiplication:
x
+
2
y
+
1
=
0
2
x
−
3
y
−
12
=
0
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Solution
By method of cross multiplication :
⇒
x
(
2
×
−
12
)
−
(
1
×
−
3
)
=
y
(
1
×
2
)
−
(
1
×
−
12
)
=
1
(
1
×
−
3
)
−
(
2
×
2
)
⇒
x
=
−
21
−
7
=
3
⇒
y
=
14
−
7
=
−
2
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Q.
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where x ≠ 0 and y ≠ 0