Write an equation to represent the statement "Four less than the product of three and x is twenty-three."
A. 3x - 4= 23
B. 4-3x = 23
C. 4x - 3= 23
D. 3 - 4x = 23

Find the gradient of f(x,y,z)equals=left parenthesis x squared plus y squared plus z squared right parenthesis superscript negative 1 divided by 2 baseline plus ln left parenthesis x right parenthesis x2+y2+z2−1/2+ln(xyz) at the point left parenthesis negative 2 comma 1 comma negative 2 right parenthesis(−2,1,−2).

How do you solve a question like this?

The difference of three and the reciprocal of a number is equal to the quotient of 20 and the number. find the number.