solve the following system of linear equations graphically 3x+y-11=0, x-y-1+0
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3x+y=11...(1) and x-y= -1...(2) .Add equations(1)&(2), we get 4x=11-1=10=> x=10/4 =2.5 . Substitute x=2.5 in equation(1), 3(2.5)+y=11=> y=11-7.5 =3.5.
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0 + 4y - 11 = -2
4y = -2 + 11
y = 2.25
Then i chose the first equation, ' 3x + y - 11 = 0
3x + 2,25 - 11 = 0
3x = 8.75/3
x = 2.92
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