Answer:
x = 
Step-by-step explanation:
Given
+
= 1
Multiply through by ab to clear the fractions
bx + ax = ab ← factor out x from each term on the left side
x(b + a) = ab ← divide both sides by (b + a)
x = 
Answer: 
Step-by-step explanation:



18 = x
__ __
5 4
x = 18•4 / 5
72/5 = 14.4 final answer
Answer:
the last one
Step-by-step explanation:
Answer: negative 7 and 7/15
Step-by-step explanation:
AB = 7/1 = 7
AC = -2/6 = -10/30
BC = 4/5 = 24/30
AC + BC = 14/30 = 7/15
Answer is 7 and 7/15