1-0.3(y-2)=(x+1)⼀5,(y-1)⼀4=(4x+9)⼀20-1

2025-03-01 22:54:51
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回答1:

1-0.3(y-2)=(x+1)/5 10-3(y-2)=2(x+1) 10-3y+6=2x+2 2x+3y=-14 4x+6y=-28
(y-1)/4=(4x+9)/20-1 5(y-1)=(4x+9)-20 5y-5=4x+9-20 4x-5y=6
11y=-34
y=-34/11
2x+3X(-34/11)=-14
2x=102/11-154/11=-52/11
x=-26/11