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唔識math....simultaneous equations(緊急)
發問:
緊急急急.... use the method of elimination to solve the simultaneous equations. 1. 2z+3y/6=6x-y/3=4 2(a). 0x-6y=11...............(1) 8x+9y=12...............(2) b.using the result of 2(a),solve the simultaneous equations. 20/a-6(b-1)=11............(1) 8/a+9(b-1)=12.............(2)
最佳解答:
2a.-6x=11------(1) 8x+9y=12-----(2) from(1) y=11/-6-----(3) sub(3)into (2) 8x+9(11/-6)=12 8x=33/2 x=33/16 sub x=33/16 into(2) 8(33/16)+9y=12 9y=33/2 y=11/6
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