Electrons do not have FEET
4x+18=7x-12
We move all terms to the left:
4x+18-(7x-12)=0
We get rid of parentheses
4x-7x+12+18=0
We add all the numbers together, and all the variables
-3x+30=0
We move all terms containing x to the left, all other terms to the right
-3x=-30
x=-30/-3
x=+10
Hope this helps :)
4:1 = 20:y
y = 20/4 = 5
hope it helps!
A sequence is a set of numbers constant, it is all regular -
The outputs have a pattern,
Hope that helps, I can't do much without seeing the set of numbers