Solve graphically the following system of linear equations 4x-3y+4=0 & 4x+3y-20=0
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4x-3y=-4 .....(1)
4x+3y=20 .....(2)
adding equation 1 and 2
4x-3y=-4
+ 4x+3y=20
8x=16
x= 2
put x= 2 in equation (2)
4(2)+3y=20
8+3y=20
3y=20-8
y=12÷3
y=4
4x+3y=20 .....(2)
adding equation 1 and 2
4x-3y=-4
+ 4x+3y=20
8x=16
x= 2
put x= 2 in equation (2)
4(2)+3y=20
8+3y=20
3y=20-8
y=12÷3
y=4
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