What inverse operation is used to solve the equation? x 2 = 10

a) add 2 to both sides
b) divide by 2 on both sides
c) multiply by 2 on both sides
d) subtract 2 from both sides

The perimeter of an equilateral triangle is 4 cm more than the perimeter of a square and the length of a side of the triangle is 8 cm more than the length of a side of the aware. find the length of a side of the equilateral triangle