How do i check solutions algebraically

If 4x=18, what is the value of 4 (X-2) ?

14.63 as a mixed number

From what alphabet has the Pi symbol been taken

Three marbles, one red (R), one yellow (Y), and one blue (B), are placed in a bag. A fair coin is flipped, and then a marble is drawn out of the bag at random. A tree diagram of the events is shown below. How many possible outcomes exist?

The perimeter of a rectangle is 132 feet and its area is 1080 square feet. find the dimensions

The O'Malley family is driving cross-country to see their cousins. So far, they have traveled 275 miles. This is 1/5 of the way to their cousins' house. How far do the O'Malleys live from their cousins?

a sun in a distance galaxy has an estimated mass of 1.61244 * 10 ^32 kg and the earth has a mass of 5.972 * 10^24 kg, how many earths would it take to equal the mass of the sun?

Why did the ant run across the cracker box

the expression 6x + 15 represents the total cost of a bicycle rental. when danny rents a bike for 2 hours, the total cost of his rental is $27. What does the coefficient 6 represent?

Bonnie uses of a cup of sugar in each cupcake. If she is making 9 cupcakes, how much sugar will Bonnie need?