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10-11-2016
Mathematics

Answered

Solve by Substitution:

3x - y = 4

y = 6 - 2x

Verified Answer :

10-11-2016

Substitute 6 - 2x for y in the first equation

3x - (6 - 2x) = 4

5x - 6 = 4

5x = 10

x = 2

Plug 5 for x in either equations (I'll use the second equation)

y = 6 - 2 * 2

y = 6 - 4

y = 2

(2,2) is the solution.

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