问题
解答题
解方程:
5x-2.2x=33.6;1.5×6+4x=25.
答案
(1)5x-2.2x=33.6,
2.8x=33.6,
2.8x÷2.8=33.6÷2.8,
x=12;
(2)1.5×6+4x=25,
9+4x=25,
9+4x-9=25-9,
4x=16,
4x÷4=16÷4,
x=4.
解方程:
5x-2.2x=33.6;1.5×6+4x=25.
(1)5x-2.2x=33.6,
2.8x=33.6,
2.8x÷2.8=33.6÷2.8,
x=12;
(2)1.5×6+4x=25,
9+4x=25,
9+4x-9=25-9,
4x=16,
4x÷4=16÷4,
x=4.