How many solutions have the pair of linear equation 2x+3y-9=0and 4x+6y-18=0?
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Answer:
2x+3y-9=0 -1
4x+6y-18=0 -2
1*2=4x+6y-18=0
2*1=4x+6y-18=0
( -) + +
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12y-36=0
y=36/12
y=3
sub y=3in 1
2x+3y-9=0
2x+3(3) -9=0
2x+9-9=0
2x=0
x=0/2
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