Solve this pair of simultaneous equations: 3x + y = 7 3x - y = 5

Solve this pair of simultaneous equations:  3x + y = 7  3x - y = 5

 

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1 Answer

3x + y = 7

3x - y = 5

add the equations

6x + 0y = 12

6x = 12

x = 2

3x + y = 7

3(2) + y = 7

6 + y = 7

y = 1

Answer:  x = 2, y = 1
by Level 13 User (103k points)

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