This question is taken from linear equations in two variables in which we have given two equations 6(ax+by)=3a+2b, 6(bx-ay)=3b-2a and we have to find the variables x and y from the given equations
RS Aggarwal, Class 10, chapter 3B, question no 44
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Given that 6(ax + by) = 3a + 2b
6ax + 6by = 3a + 2b ——— (1)
6(bx – ay) = 3b – 2a
6bx – 6ay = 3b – 2a ————- (2)
On solving (1) a & (2) b, we get
6ax 2 + 6aby = 3a 2 + 2ab
6b 2 x – 6aby = 3b 2 – 2ab
—————————————
6ax^2 + 6b 2 x = 3a^2 + 3b^2
6x(a^2 + b^2) = 3(a^2 + b^2)
x = 3/6 x = 1/2.
Substitute x = 1/2 in above equations,
we get
6ax + 6by = 3a + 2b
6a(1/2) + 6by = 3a + 2b
3a + 6by = 3a + 2b
6by = 2b
y = 2b/6b
y = 1/3.
Therefore the value of x = 1/2 and y = 1/3.