Both x and y equal 2.
2•2=4 + 2•2=4
4+4=8
2+2=4
9 to the second power:
9 x 9 = 81
Answer: 
Step-by-step explanation:
Find the least common multiple (LCM) of the denominators. This is:

Divide the LCM by each denominator and multiply the result by each numerator, then you obtain:

Apply the distributive property, then you obtain:

Add like terms, then you obtain:
