Question

Tìm x, biết   2x(x-5) - x (3+2x) = 26 

Answer 1

2x(x-5) - x(3+2x) = 26

<=> 2x^2 -  10x - 3x - 2x^2 = 26

<=> -13x=26

<=> x = -2

Answer 2

2x(x-5) - x (3+2x) = 26 

=> 2x² - 10x - 3x - 2x² = 26

=> (2x² - 2x²) + (-10x - 3x) = 26

=>  -13x = 26

=> x = 26 : (-13) 

=> x = -2

Answer 3

2x(x-5)-x(3+2x)= 26

2x²-10x-3x-2x²= 26

            -13x        = 26

                  x        = -2