exam Maths Puzzle Numerical Ability

Hello friends. I need some more help :(
Solve using substitution

4x - 12y = 5
-x + 3y = -1
Thanks

Read Solution (Total 0)

exam Other Question

3[9-(6-3)]-10 Alright heres my problem:
1000 students enter a school {one at a time}to see 1000 lockers they are all closed.

The first student changes the situation of all 1000 lockers {if t