3/10x+7x-1/4x=21.155(x-4)+3(9-x)=12+7(7-x)(19x+2/5)÷2=41又3/5÷(x-0.45)=16/5x+1/4(1-2/7x)=7/80.6(x-0.6)=0.6
问题描述:
3/10x+7x-1/4x=21.15
5(x-4)+3(9-x)=12+7(7-x)
(19x+2/5)÷2=4
1又3/5÷(x-0.45)=16/5
x+1/4(1-2/7x)=7/8
0.6(x-0.6)=0.6
答