Question

Solve the following equations for x and y using cross-multiplication

method :

(ax – by) + (a + 4b) = 0

(bx + ay) + (b – 4a) = 0

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Answer 1

Answer:

x= 1/2.y = -2

Step-by-step explanation:

Answer 2

Step-by-step explanation:

-b a+4b a -b

a b-4a b a

x/-b(b-4a)-a(a+4b)=y/(a+4b)(b)-(b-4a)(a)=1/a×a-(b×-b)

x/(-b^2+4ab-a^2-4ab)=y/(ab+4b^2-ab+4a^2)

=1/a^2+b^2

x/-(a^2+b^2)=1/a^2+b^2

x=-1

y/4b^2+4a^2=1/a^2+b^2

y=4

x=-1,y=4