x-1:4.5=5.8:2.94.5×5.8=2.9×(x-1)x-1=9x=10
根据比的计算方法,两外项相乘等于两内项相乘所以得:2.9(x-1)=26.12.9x=26.1+2.9所以:x=10
4.5*5.8/2.9=X-19=x-1x=10
X-1=2*4.5=9,X=10
X-1=4.5*0.2
10