Question

cross multiplication method x+y=3 & 2x-3y=26

Answer 1

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Your answer is in attachment.

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Answer 2

Heya!!!

↪ Here's your answer friend,


Above equations Can be written as

x + y - 3 = 0 ........(1)

2x - 3y -26 = 0 ...........(2)

On comparing above equations

we get,

a1 = 1, b1 = 1, c1 = -3

a2 = 2, b2 = -3, c2 = -26

Therefore,

By cross multiplication method :

x / b1c2 - b2c1 = y / c1a2 - c2a1 = 1 / a1b2 - a2b1

==> x / 1 x (-26) - (-3)(-3) = y / -3 x 2 - (-26)1 = 1 / 1 (-3) - 2 x 1

==> x / -26 - 9 = y / -6 +26 = 1 / -3 -2

==> x / -35 = y / 20 = 1 / -5

On comparing 1st and 3rd we get,

==> x / -35 = 1 / -5

==> x = 7

and now on comparing 2nd and 3rd we get,

==> y / 20 = 1 / -5

==> y = -4

Therefore, x = 7 and y = -4

⭐ Hope it helps you : ) ⭐