It is true. I was recently doing this in class
X = 0, y = 4, z = -3
You can solve this by using the two equations with the z to create a fourth equation. Get the z's to equal each other my multiplying the whole equation by factors that would do so. Then subtract them from each other to get it to cancel out. Then you can use that equation along with the middle equation to solve for either x or y in the same way. Once you have one answer, you can use the middle equation to find the second one and any equation to find z.
He needs 34.32 pounds to make 50. I believe he needs 4.375 cans.
Answer:
235$
Step-by-step explanation:
85+2x=555
-85 -85
2x=470
2x/2x 460/2x
235
so the freshman class raised 235$
