Question

What is the solution to this system of linear equations x+y=4 and x-y=6

Answer 1

1) x + y = 4

2) x - y = 6
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Add like terms of the two equations


2x + 0 = 10
2x = 10
x = 5

Look at the first equation:

x + y = 4
5 + y = 4
y = 4 - 5 = -1
y = -1

Answer: ( 5, -1)