1. 30-70h=30
2. 300+70h=-30
3. 300-70h=-30
4. 300+70h=30

It is 300-70h=30

If you do the math 300 - 30 kilos to go is 270 kilos. 270 kilos divided by 70 kilos is about 3.85. So with the correct equation you can solve and find it true. 300 - 70(3.85) is roughly 30.

The answer to your question is b’(16,14)

Your answer should be 1/3. i hope i could ! good luck : )