2x+21-x=3, x = কত?

2x+21-x=3, x = কত? Correct Answer 0,1

2x  + 21 - x = 3⇒2x + 212x = 3⇒a + 2a = 3[2x = a]⇒a2 + 2 = 3a⇒a2  - 3a  + 2 = 0⇒a2  - 3a  - a + 2 = 0⇒a(a - 2) - 1(a - 2) = 0⇒(a - 2)(a - 1) = 0এখন, a - 2 = 0         এবং a - 1 = 0 .'. a = 2                           এবং  a = 1 ⇒2x = 2                         এবং  2x = 1    ⇒2x = 21                   এবং 2x = 20⇒x = 1                  এবং x  = 0      .'.x = (0.1)