What's the answer to this equation?

Sadie computes the perimeter of a rectangle by adding the length, l, and width, w, and doubling this sum. eric computes the perimeter of a rectangle by doubling the length, l, doubling the width, w, and adding the doubled amounts. write an equation for sadie’s way of calculating the

Find the solution of system of equation y= x-4 y=4x+2

Write an expression that has three terms and simplifies to 4x - 7. identify the coefficient(s) and constant(s) in your expression