The rectangle is 48 feet long. To find area just take the lenght, and the width and multiply them. In this case the length is 12 feet, and the width is 34 feet. So 12 x 34 = 48 ft.
~Deceptiøn
As with a system of equations, call them A and B in order to keep them straight.
A: x + y = 7
B: x = y + 3
Because in B we have x on one on one side and not x on the other, substitution is the way to go. Substitute equation B into equation A.
x + y = 7 Equation A
y + 3 + y = 7 Putting B into A
2y + 3 = 7 Collect like terms
2y = 4 Subtract 3 on both sides
y = 2 divide both sides by 2
With y = 2 we can substitute that back into an original equation. Choose B.
x = y + 3
x = 2 + 3
x = 5
Thus x = 5 and y = 2, or (5, 2) is the solution of this system.
