Can someone help me simplify and write in power form and show me step by step how to do it?

What is the value of x in the equation 2(x-4) = 4(2x + 1)?

Angle 1 and angle 2 are a linear pair . m angle 1 =x-39 and m angle 2 =x+61 find the measure of each angle

Mrs. piazza invested 8000 in a certificate of deposit that pays 3% simple interest for 4 years. how much will be in mrs. piazza's account at the end of 4 years