Show how you solve the following two equations: x + 3 = 18 x+3/4=2 1/4

2(4)+1=9. 9/4-3/4 = 6/4 which simplifies to 3/2 or 1.5. x+3=18, subtract 18-3 and get your answer as 15 :)

1.)     x+3=18
the 1st thing that you must do is you have to put x by itself so you need to subtract 3 from 18 to even it out. Which is x=15 so that means that 15+3=18  which is true.
2.)     x+3/4=2 1/4
the 1st things that you must do is you must get the x to be by itself so you need to subtract 3/4 by 2 1/4 to even it out. Which is x= 1 1/2 so that means that 1 1/2+3/4=2 1/4 which is true.