0.5x+2x=16.2 x-0.3x=0.21 14.2x3.4x=32.4 9.4x+x=31.2
这些题怎么做?急!
0.5x+2x=16.2 x-0.3x=0.21 14.2x3.4x=32.4 9.4x+x=31.2
这些题怎么做?急!
0.5x+2x=16.2
2.5x=16.2
x=16.2÷2.5
x=6.48
....................
x-0.3x=0.21
0.7x=0.21
x=0.21÷0.7
x=0.3
....................
14.2x3.4x=32.4
48.28x=32.4
x=32.4÷48.28
x=0.67
........................
9.4x+x=31.2
10.4x=31.2
x=31.2÷10.4
x=3
每个题目打分开点把 根本分不清楚是哪些题目
0.5x+2x=16.2
2.5x=16.2
x=6.48
x-0.3x=0.21
x=0.3
14.2x3.4x=32.4
48.28x=32.4
x=0.671
9.4x+x=31.2
x=3