合并同类项
=1/10x+6+3/10x+18+136+3x/4-3/4*1/10x-18/4-9/4*1/10x-54/4-102+80+300
=1/10x+3/10x-3/4*1/10x-9/4*1/10x+3x/4+6+18+136-54/4-102+80+300
=1/10x+3x/4+391-1/2
只能简化到这了.你想算出x怎么也得有个等式.