How do you solve 4x-7x=13

Acredit card advertises an annual interest rate of 23%. what is the equivalent monthly interest rate?

Anew landowner is interested in constructing a fence around the perimeter of her property. her property is 1,080√30 feet wide and 500√20 feet long. what is the perimeter of the property? (recall that the perimeter is the sum of each side of a shape or boundary). a 1,580√40 feet b. 5,320√5 feet c. 3,160√20 feet d. 10,640√5 feet

How do you find percent change? ? i will give brainliest for the bestme i don’t understand