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a + 3b = 12, a = 12 - 3b

3(12-3b) + b = 20

36-9b + b = 20

36-8b = 20

8b = 16

b = 2

2a + 12 = 24

2a = 12

a = 6

We are accustomed to thinking of literary works as fixed texts by a single author. Among other reasons, this is because of the impact of the printing press on publishing and distributing texts in our soci...

x^2 - 8x - 20

(x - 10)(x+2)

(Explanation and helping understanding) Remember the last 2 numbers must multiply to equal the last number in the question and add together to equal the middle nu...

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