book
Maths Puzzle
Numerical Ability
what is the solution to z/20+1/12=z/15-1/10 and 4W+23/5=19-W/7
Read Solution (Total 0)
book Other Question
a^2-9ab+81b^2
No matter how I try, I am not understanding this type of problem....
3x -2y + 5z
____________
2y -3x -5z
This is how I try....
3x (3x-2y + 5z) -(2y + 5z)
_________