解方程 :1:1.8+x =2.4 2:x÷2.8=0.4 3 :4x-2.5×0.5 =3.75
问题描述:
解方程 :1:1.8+x =2.4 2:x÷2.8=0.4 3 :4x-2.5×0.5 =3.75
答
1:1.8+x =2.4
x = 2.4-1.8
x = 0.6
2:x÷2.8=0.4
x = 0.4 X 2.8
x = 1.12
3 :4x-2.5×0.5 =3.75
4x = 3.75 + 2.5 X0.5
4x = 5
x=1.251:x-四分之一x=八分之五 2:4(x-2)=8