Question 61870
Do the inverse operations to both sides in order to isolate p.  (If something that you need to move is added, subtract it, if its subtracted, add it, if it's multiplied, divide it, if it's divided multiply it.)
6p-7=2p+9
6p-2p-7=2p-2p+9
4p-7=0+9
4p-7=9
4p-7+7=9+7
4p=16
4p/4=16/4
{{{highlight(p=4)}}}
:
Check by subtituting 4 in for p in the original equation and see if both sides =.
6(4)-7=2(4)+9
24-7=8+9
17=17  We're right!!!!
Happy Calculating!!!