Question 129521
let x=years


"You planted a 16-inch hemlock tree that grows at a rate of 4 inches per year"
__ 16+4x


"5 years later you planted a 10-inch blue spruce tree that grows at a rate of 6 inches per year"
__ 10+6(x-5)


"how many years after you planted the hemlock tree will the two trees be the same heigh?
__ 16+4x=10+6(x-5)


16+4x=10+6x-30 __ 36=2x


substitute value of x into 16+4x to find height