7/18x+3/4x等于123/2 5/8除以5/4+3/22除以9/11
1/5除以(4/5-1/3)乘2/3
7/18x+3/4x等于123/2 5/8除以5/4+3/22除以9/11
1/5除以(4/5-1/3)乘2/3
7/18x+3/4x=123/2
14x+27x=123*18
41x=123*18
x=54
5/8÷5/4+3/22÷9/11
=5/8*4/5+3/22*11/9
=1/2+1/6
=2/3
1/5÷(4/5-1/3)*2/3
=1/5÷7/15*2/3
=1/5*15/7*2/3
=2/7