Question

$if \: x \: is \: not \: equal \: to \: 0$
then x= ?
​

Answer 1

Step-by-step explanation:

$1(3x\times 4-3\times 5x)-x (1\times 4-1\times 5x)\\+2x(1\times 3-1\times 3x)=0\\</p><p>=(12x - 15x)-x(4-5x)+2x(3-3x)=0\\</p><p>-3x-4x+5x^2 +6x-6x^2=0 \\</p><p>-x-x^2 =0\\</p><p>-x(1+x)=0\\</p><p>\implies -x = 0 \:\: or \:\: 1+x=0\\</p><p>\therefore x = 0\:\: or \:\: x=-1\\</p><p>But x\neq 0\\</p><p>\huge\red{ \fbox {\therefore x = - 1} }$