问题
解答题
解方程:
x+3x=12.6;
x÷0.3=6.8;
x-12.5=12.5.
答案
(1)x+3x=12.6,
4x=12.6,
4x÷4=12.6÷4,
x=3.15;
(2)x÷0.3=6.8,
x÷0.3×0.3=6.8×0.3,
x=2.04;
(3)x-12.5=12.5,
x-12.5+12.5=12.5+12.5,
x=25.
解方程:
x+3x=12.6;
x÷0.3=6.8;
x-12.5=12.5.
(1)x+3x=12.6,
4x=12.6,
4x÷4=12.6÷4,
x=3.15;
(2)x÷0.3=6.8,
x÷0.3×0.3=6.8×0.3,
x=2.04;
(3)x-12.5=12.5,
x-12.5+12.5=12.5+12.5,
x=25.