3d - e = 7

d + e = 5

use the linear combination method to solve

a. there are infinitely many solutions

b. there is no solution

c. the solution is (2,-1)

d. the solution is (3,2)

Distributive property: -7k-10k-2 (3k-4)

3√2x+1 as lim = Δx →0

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