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Solve each of the following systems of equations by the method of cross-multiplication: (a+2b) x+(2a-b) y = 2 ; (a-2b) x+ (2a+b)y =3

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+1 vote
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asked Feb 3, 2018 in Mathematics by sforrest072 (157,439 points) ● 61 ● 410 ● 940
edited Mar 5, 2018 by faiz
Solve each of the following systems of equations by the method of cross-multiplication:
(a+2b) x+(2a-b) y = 2
(a-2b) x+ (2a+b)y =3

1 Answer

+1 vote
answered Feb 3, 2018 by mdsamim (213,225 points) ● 5 ● 10 ● 15
selected Feb 3, 2018 by sforrest072
 
Best answer

The given system of equations may be written as

By cross multiplication, we have

 Is the solution of the given system of equations.

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