二元一次方程组{4x+3y=1 ax+(a-1)y=3 的解中,x与y的值相等,则a等于多少?
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二元一次方程组{4x+3y=1 ax+(a-1)y=3 的解中,x与y的值相等,则a等于多少?
二元一次方程组{4x+3y=1 ax+(a-1)y=3 的解中,x与y的值相等,则a等于多少?
二元一次方程组{4x+3y=1 ax+(a-1)y=3 的解中,x与y的值相等,则a等于多少?
x=y=t,
7t=1,
t=1/7,x=y=1/7,
a/7+(a-1)/7=3,
2a/7=22/7,
a=11.
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1+1=3