himpunan penyelesaian dari 3x-2y-8=0 dan 4x+y-7=0

3x-2y-8 = 0
4x+y-7 = 0

3x(4)-2y(4)-8(4) = 0
4x(3)+y(3)-7(3) = 0
-------------------------- -

12x-8y-32 = 0
12x+3y-21 = 0
-------------------------- -
-11y-11 = 0
-11y=11
y = -1

4x+y(-1)-7 =0
4x-1-7 =0
4x-8=0
4x = 8
x = 2

4(2)+1(-1)-7 = 0
8-1-7= 0

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