Answer:
SD = 27.
Step-by-step explanation:
It is given that,
SA = 5x-8
AD = 2x
SD = 4x+7
Note : A should be the mid point of S and D.
SD = SA+AD
Putting all the values,
4x+7=5x-8+2x
taking like terms together
4x-5x-2x=-8-7
-3x=-15
x = 5
The value of x is 5
Put x = 5 in SD = 4x + 7
So,
SD = 4(5) + 7
SD = 27 units
So, the value of SD = 27.
