thanks but i do need help to solve the third part also, I did get these equations but don't know how to put them together to solve the third.

Question

thanks but i do need help to solve the third part also, I did get these equations but don't know how to put them together to solve the third.

thanks for helping further!

Answer 1

Write equation 1.

4p + 3g = #1.30

Write equation 2.
2p + 4g = #1.20

Now multiply equation 2 by 2 to give
4p + 8g = #2.40

Now multiply that equation by -1
-4p - 8g = -#2.40
Now add this last equation to equation 1. You see the +4p from equation 1 and the -4p from equation 2 add to zero which leaves just g as an unknown. Solve that for the price of g, put that value back into equation 1 to find the cost of p, THEN you can do part 3.

Answer 2

Sorry bit thick, why do you multiply equation 2 by 2?

Answer 3

You have TWO unknowns, both p and g, You must have two equations. The idea here is to MAKE one equations what it needs to be to zero out one of the unknowns. By multiplying equation 2 by 2, I get 2x2 = 4, then by multiplying by -1, I get -4p and you can see that -4p and +4p (from equation 1) add to zero. And that leaves you with just the one unknown containing g. You COULD have multiplied equation 1 by 4 and equation 2 by 3 which will make the g term 12g and they would have added out BUT it's easier to do just the one.

Answer 4

You're welcome! I'll be glad to help you put the equations together to solve the third part. Could you please provide me with the specific equations you have for the problem? Knowing the equations will help me guide you through the solution more effectively.