What is the value of x
7x+11=4x-4

Jada has a meal in a restaurant she adds up the prices listed on the menu for everything they ordered and gets a subtotal of $42.00. when the check comes, it says they also need to pay $3.99 in sales tax. what percentage of the subtotal is the sales tax

What is the sum of the first 8 terms of the geometric series

Zahra wants the equation below to have an infinite number of solutions when the missing number is placed in the box.