Optimizing the Bakery Learning Goal: To use substitution and cancellation to sol

Question

Optimizing the Bakery Learning Goal: To use substitution and cancellation to solve a system of two linear equations in two unknowns. Frequently, in physics, you will have two different unknown quantities (for instance, distance and If you have two different equations involving these two unknown quantities, then you will be able to find exact values for each of them. These will usually consist of two linear equations--equations that only contain terms like 2z, y, and constant numbers-with two unknowns. In this problem, you will learn how to solve such systems, as well as see how equations of this type can be used to make a business more profitable.

Explanation / Answer

The two equations are,

x+y=40

y=0

To solve it, we need to multiply the second equation by -1 and then add to the previous equation. so we get,

x+y-y = 40+0

x = 40

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