x+2y=-4,3x-5y=-1 by cross multiplication method
Answers
Answer:
The answer is x = 2 and y = 1
Step-by-step explanation:
here,
a1 = 1 ,b1 = 2 , c1 = 4
a2 = 3 ,b2 = -5 ,c2 = 1
cross multiply in the form BCAB
X y 1
2 4 1 2
-5 1 3 -5
cross multiply this
we will get
X y 1
------------- = -------------- = ------------------
(2)(1) - (-5)(4) (4)(3) - (1)(1) (-5)(1) - (3)(2)
which is
X Y 1
---------------- = ------------ = ------------
22 11 11
CROSS MULTIPLY X AND Y WITH 1
X 1
-------------------- = ---------------------
22 11
which gives us
X = 2
y 1
----------------------- = ------------------
11 11
which gives us
Y = 1