To do 130% increase you multiply by 1.3 so you do 810 × 1.3 = 1053
Answer:

Step-by-step explanation:
Setting it up as a fraction will help us see the simplification process a bit easier.

a/a = 1, so they cancel each other out, leaving us with simply

Answer:
x = 7/2 (or 3 1/2 or 3.5)
Step-by-step explanation:
2x + 5 = 12
2x = 7
x = 7/2 (or 3 1/2 or 3.5)