Find x: 3x-14+6-4-2x=12

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).

In a class, there are 12 girls. if the ratio of boys to girls is 5: 4 how many boys are there in the class

An 18% discount on a watch saved a shopper $72. find the price of the watch before the discount