how do I solve this system of linear equations {y=x+1
{y=2x-1
do I use in number ? how do you no which number to sub. for x and y please help

Question

how do I solve this system of linear equations  {y=x+1
                {y=2x-1
do I use in number ? how do you no which number to sub. for x and y please help

anonymous · Answer

ok, here y= either x+1, or 2x-1. therefore, you can set both equal to each other: 
2x-1=x+1 
x-1=1 (subtract x on both sides)
x=2 (and 1 to both sides)
you can check if this is correct by substituting 2 in both functions, and see if you get the same value

anonymous · Answer

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