How do I find the intersection of the lines. x + y = 5 and 3x - y = 1 to where I can graph the lines?
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solve the equations to find the intersection,
3x-y = 1
add the two eqs,
x = 3/2
y = 7/2
I do not understand how to do it. I need clarification.
add the two eqs:
left side to left side and right side to right side
x+y+3x-y = 5+1
4x/4 = 6/4
x = 6/4 = 3/2
then plug in x = 3/2 into x+y = 5
3/2+y = 5
y = 5-3/2 = 7/2
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