Question 1201029
a = lengh
b = width
a + 2b = 9000
a = b + 4500
replace a with b + 4500 to get:
b + 4500 + 2b = 9000
combine like terms and subtract 4500 from both sides of the equation to get:
3b = 4500
solve for b to get b = 1500
since a = b + 4500, then a = 6000
a + 2b becomes 6000 + 3000 = 9000
a is the length = 6000
b is the width = 1500
the area of the enclosed space is a * b = 6000 * 1500 = 9,000,000 square yards.