等式两边乘以60
5x+60x-12=60
65x=72
X
=72/65
x/12+x-2/10=1x/12+12x/12=1+2/1013x/12=12/10x=12/10x12/13x=144/130x=72/65
x/12+x-2/10=1这里2是分子,还是x-2是分子?