You can put this solution on YOUR website! .......1
......2
.......3...I assume you have here too as in previous two equations
_____________________________
......2...solve for .........2a
.......3..solve for .......3a
___________________
.......1...plug in from 2a
...cancel ... now go to 3a
.......3a..plug in ..solve for .... now go to 2
.......solve for