If `11-3x` is 4 less than 13, what is the value of 6x?

If (4)7/11=x/11 what is the value of x?

If 20 percent of x is 36 less than x percent of x-70, what is the value of x?

If (11- 13x)/(x) + (11- 13 y)/(y) + (11- 13 z)/(z) =5, then what is the value of 1/x + 1/y + 1/z ?

If 3x+ 4y-11 = 18 and 8x- 6y +12 = 6, then what is the value of 5x- 3y - 9?

If 3 x + 4y - 11= 18 and 8x - 6y + 12 = 6 , then what is the value of 5x - 3y - 9 ?

(2x ^(2) + 3x -4) (3x +2) = 6x ^(3) + ax ^(2) -6x-8 In the above equation, a is a constant. If the equation is true for all value of x, what is the value of a ?

If (16 ^(3x))(32 ^(x))(8 ^(3x))=((4 ^(6x)) (32^(3x)))/(4), then what is the value of x ?