Answer:
AB=11.4
CD=24.4
Explanation:
Since AD=11x+10.6, then AB+BC+CD = AD.
Hence,
2x+3+21+7x-5=11x+10.6
Combine like terms:
9x+19 = 11x+10.6
Subtract 9x on both sides:
19 = 2x+10.6
Subtract 10.6 on both sides:
2x=8.4
Divide by 2 on both sides:
x=4.2
Since AB=2x+3, AB=11.4
Since CD=7x-5, CD=24.4