(1) 0.7(3x-3.7)-4=-1.3(3x-3.7) (2) 60%(y-1)=0.1+34%(y+1) (3) (0.2分之0.3+0.2x)+0.5x=0.75
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(1)0.7(3x-3.7)-4=-1.3(3x-3.7)(2)60%(y-1)=0.1+34%(y+1)(3)(0.2分之0.3+0.2x)+0.5x=0.75(1)0.7(3x-3.7)-4=-1
(1) 0.7(3x-3.7)-4=-1.3(3x-3.7) (2) 60%(y-1)=0.1+34%(y+1) (3) (0.2分之0.3+0.2x)+0.5x=0.75
(1) 0.7(3x-3.7)-4=-1.3(3x-3.7) (2) 60%(y-1)=0.1+34%(y+1) (3) (0.2分之0.3+0.2x)+0.5x=0.75
(1) 0.7(3x-3.7)-4=-1.3(3x-3.7) (2) 60%(y-1)=0.1+34%(y+1) (3) (0.2分之0.3+0.2x)+0.5x=0.75
(1) 0.7(3x-3.7)-4=-1.3(3x-3.7)
0.7(3x-3.7)+1.3(3x-3.7)=4
2(3x-3.7)=4
3x-3.7=2
3x=5.7
x=1.9
(2) 60%(y-1)=0.1+34%(y+1)
60(y-1)=10+34(y+1)
60y-60=10+34y+34
26y=104
y=4
(3) (0.2分之0.3+0.2x)+0.5x=0.75
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