题目内容
| 解方程. 13+x=28.5 | 2.4x=26.4 | 4x+13=365 |
| 30x+15x=22.5 | 96÷6+4x=56 | 3x-2×7=40. |
(1)13+x=28.5,
13+X-13=28.5-13,
x=15.5;
(2)2.4x=26.4,
2.4X÷2.4=26.4÷2.4,
X=11;
(3)4x+13=365,
4X+13-13=365-13,
4X=352,
4X÷4=352÷4,
X=88;
(4)30x+15x=22.5,
45X=22.5,
45X÷45=22.5÷45
X=0.5;
(5)96÷6+4x=56,
16+4X=56,
16+4X-16=56-16,
4X=40,
4X÷4=40÷4
X=10;
(6)3x-2×7=40,
3X-14=40,
3X-14+14=40+14,
3X=56,
3X÷3=56÷3,
X=18
.
13+X-13=28.5-13,
x=15.5;
(2)2.4x=26.4,
2.4X÷2.4=26.4÷2.4,
X=11;
(3)4x+13=365,
4X+13-13=365-13,
4X=352,
4X÷4=352÷4,
X=88;
(4)30x+15x=22.5,
45X=22.5,
45X÷45=22.5÷45
X=0.5;
(5)96÷6+4x=56,
16+4X=56,
16+4X-16=56-16,
4X=40,
4X÷4=40÷4
X=10;
(6)3x-2×7=40,
3X-14=40,
3X-14+14=40+14,
3X=56,
3X÷3=56÷3,
X=18
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