2x + 9x simplified would be 11x
2x + 5x - 1 = 9x 7x - 1 = 9x -1 = 9x - 7x -1 = 2x -1/2=x
2x + 3= 9.X=
2x+3=9x 3=9x-2x 3=7x x=3/7
2x + 3 = 9x Subtract 2x from both sides: 3 = 7x Divide both sides by 7: 3/7 = x
The expression simplifies to: -7x-4
2x2 - 9x = 18 2x2 - 9x -18 = 0 (2x - 18)(x + 9) x= -9 and 9
2x + ? = 9x9x - 2x = 7xso...2x + 7x = 9x
2x + 3y = 9x = 3, y = 1 therefore 6 + 3 = 9
You can solve this as a quadratic (it's degree is 2). 9x^2+2x=7 9x^2+2x-7=0 (Hey, a quadratic!) (9x-7)(x+1)=0 Thus, the solutions for x to this problem are -1, and 7/9.
2x + 24 = 9x - 39= 2x + 63 = 9x= 63 = 7x= x = 9
Use the quadratic formula. x = -4.265564 or -0.234436