book Maths Puzzle Numerical Ability

Solve the system by addition

5x + 9y = -12
x - 2y = 10

Read Solution (Total 0)

book Other Question

I have a math exam tomorrow and i can not figure out this problem!! can you help? (it is not from a text book. . . she made our review up)
Log(6)5= Log(6)(2x+1)- log(6)(3x+4)
* the parenthesis are the bases! I had this problem:
Turn 48% to a fraction
How do I do that?