Question

2a+2b=2
4a-9b=-1
solve it by cross multiplication method give whole answer plz​

Answer 1

Answer:

2ax+3by=a+2b=>2ax+3by−(a+2b)=0

3ax+2by=2a+b=>3ax+2by−(2a+b)=0

Using cross-multiplication method,

(3b)(−(2a+b))−(2b)(−(a+2b))

x

​  

=  

(−(a+2b))(3a)−(−(2a+b))(2a)

y

​  

=  

(2a)(2b)−(3a)(3b)

1

​  

 

b  

2

−4ab

x

​  

=  

a  

2

−4ab

y

​  

=  

4ab−9ab

1

​  

 

−b(4a−b)

x

​  

=  

−a(4b−a)

y

​  

=  

−5ab

1

​  

 

=>  

−b(4a−b)

x

​  

=  

−5ab

1

​  

or,x=  

5a

4a−b

=>  

−a(4b−a)

y  

=  

−5ab

1

​ or,y=  

5b

4b−a  

∴x=  

5a

4a−b  

andy=  

5b

4b−a

Step-by-step explanation:

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