Answer:
this should be correct, im sorry im wrong.
Step-by-step explanation:
Answer:
5/2
Step-by-step explanation:
divide both sides by 4
Answer:
27
Step-by-step explanation:
Let her sisters age be x.
=>sister .....x
Sarah.
twice x=2x. then less than 5
=> (2x-5 )
if Sarah = 15 years
by substation, 2x-5=15
4x-8 = 31
4x = 31 + 8
4x = 39
x = 9.75