Answer:
15
Step-by-step explanation:
9/ 10 = X /10
multiply each side by 10
9 = x
Choice A
3
substitute x = 4 , y = 6 into the expression
y - (5 - (x - y))
= 6 - (5 - (6 - 4))
= 6 - (5 - 2))
= 6 - 3
= 3
