(x+1.2)x5除以2=7.5
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(x+1.2)x5除以2=7.5
(x+1.2)x5除以2=7.5
(x+1.2)x5除以2=7.5
.
(x+1.2)x5=15
x+1.2=3
x=1.8
x=1.8
(x+1.2) * 5=15
x+1.2=3
x=1.8
1.8
(x+1.2)x5除以2=7.5
(x+1.2)x5除以2=7.5
(x+1.2)x5除以2=7.5
.
(x+1.2)x5=15
x+1.2=3
x=1.8
x=1.8
(x+1.2) * 5=15
x+1.2=3
x=1.8
1.8