I got the last question so please don't worry..
These are the ones I get confused with.
7y +21 x - 15 = 4y- 12 + 13
I need to see the numberical working out asap if someone would be so kind .. thanks P
7y +21 x - 15 = 4y- 12 + 13
I assume that once again, you are solving for y ?
7y - 4y = -12 + 13 + 15 - 21x
3y = 16 - 21x
divide each term by 3
y = 16/3 - 7x