Which of the following equations is not a linear equation in one variable?
$A . 9 x - 9 = 9 B . 2 x - 2 y = 2 C . x - \frac{5}{2} = \frac{5}{2} D . 4 - 4 x = 44$

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x + y = 5, 2 x + 2 y = 10

x - y = 8, 3 x - 3 y = 16

2 x + y - 6 = 0, 4 x - 2 y - 4 = 0

2 x - 2 y - 2 = 0, 4 x - 4 y - 5 = 0

\frac{a_{1}}{a_{2}}, \frac{b_{1}}{b_{2}}

\frac{c_{1}}{c_{2}}

3 x + 2 y = 5; 2 x - 3 y = 7

2 x - 3 y = 8; 4 x - 6 y = 9

\frac{3}{2} x + \frac{5}{3} y = 7; 9 x - 10 y = 14

5 x - 3 y = 11; - 10 x + 6 y = - 22

\frac{4}{3} x + 2 y = 8; 2 x + 3 y = 12

Solve the following pair of linear equations by the elimination method and the substitution method :

(i) x+y=5 and 2x−3y=4
(ii) 3x+4y=10 and 2x−2y=2
(iii) 3x−5y−4=0 and 9x=2y+7
(iv) x2+2y3=−1 and x−y3=3

(A) 9 x - 9 = 9 (B) 2 x - 2 y = 2 (C) x - \frac{5}{2} = \frac{5}{2} (D) 4 - 4 x = 44

Is $4 x + 5 - y = 0$ a linear equation in one variable?

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