What is the solution of the system equations x + 2y = 1 and 2x -y = 7
2 answers:
To give you a simple answer the solution is ( 3, -1)
x + 2y = 1
x = 1 - 2y
2x - y = 7
2(1 - 2y) - y = 7
2 - 4y - y = 7
-5y = 9
y = -9/5
x = 1 - 2y
x = 1 - 2(-9/5)
x = 1 + (18/5)
x = 23/5
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