I need some simple equations that equal 12,20,21,31.

Simply: 6 (x+2) + 3 (x-9)

1 - 2 = w What does w equal

Solve the system of equations by substitution. X=-4y X+5y=2

Which fraction is greater then 5/6? is it 7/8 4/5. 3/4 or 2/3

What is the volume of a cylinder with a height of 19.1 in and a base with a diameter of 12.8 in, to the nearest tenth of a cubic inch?

Find the area in square units of a rectangle with the given dimensions 5*7

12 lb = ___ oz I forgot how many ounzes are in a pound = T

A confectioner sells the milk after mixing some water in it at the same rate at which he bought. If he gains 25 % in this way, the quantity of watey mixed with per litre of milk

What number is less than - 2 4/5 and greater than - 31/5

Katya is 15 years old, which is 5/6 of her brother's age. How old is her brother?