Solve the following system of linear equations by elimination method: 2x +3y – 12 = 0, 7x – 3y -15 = 0
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Just add both ... y will get eliminated
=> 9x = 27=> x=3
Put in any equation
=> y= 2
=> 9x = 27=> x=3
Put in any equation
=> y= 2
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Answer:
2x+3y=12 fist eq
7x-3y=15 2nd eq
both multiply eq 1st by 7 and eq 2nd by 2
14x+21y=84
14x-6y=30
(-) (+) (-)
27y=54
y=2
2x+3y=12
2x+3(2)=12
2x=12-6
2x=6
x=3
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