Answer:

Step-by-step explanation:
To solve this problem use the formula "<u><em>Difference of squares</em></u>":

In this problem we have the following equation

This we can write it in the following way

Then if a = x and b = 8 then:

Then the product of both factors is equal to zero when:

Or

Word | know | Unknown
Language| 12 | x
Total | 180 | 28980
Use cross multiply:
12(28980) = 180(x)
347760 = 180x
347760/180=1932
Step-by-step explanation:
y=-½x+3
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