一道方程求答案,写出具体过程(移项法).1.25x × 3.5=3.5x +70
问题描述:
一道方程求答案,写出具体过程(移项法).
1.25x × 3.5=3.5x +70
答
1.25x × 3.5=3.5x +70
1.25x =x +20
0.25x=20
x=80
答
1.25x × 3.5=3.5x +70
4.375x =3.5x +20
(4.375-3,5)x=20
0.875x=20
x=20÷0.875
x=22.多
答
1.25x × 3.5=3.5x +70
1.25x × 3.5-3.5x=70
1.25× 3.5x-3.5x=70
(1.25-1)×3.5x=70
(1.25-1)×3.5x=20×3.5
0.25x=20
x=80