(x+16)*2.1=42 x-0.6x=4.888 16*5-5x=26.5 98.6-0.25x=46.3 x-2.8+2.2=5 4.5-1.5x=1.5 8*(2x-5)=28
展开全部
(x+16)*2.1=42
x+16=20
x=4
x-0.6x=4.888
0.4x=4.888
x=12.22
16*5-5x=26.5
5x=80-26.5
5x=53.5
x=10.7
98.6-0.25x=46.3
0.25x=98.6-46.3
0.25x=52.3
x=209.2
x-2.8+2.2=5
x-0.6=5
x=5.6
4.5-1.5x=1.5
1.5x=4.5-1.5
1.5x=3
x=2
8*(2x-5)=28
2x-5=3.5
2x=8.5
x=4.25
x+16=20
x=4
x-0.6x=4.888
0.4x=4.888
x=12.22
16*5-5x=26.5
5x=80-26.5
5x=53.5
x=10.7
98.6-0.25x=46.3
0.25x=98.6-46.3
0.25x=52.3
x=209.2
x-2.8+2.2=5
x-0.6=5
x=5.6
4.5-1.5x=1.5
1.5x=4.5-1.5
1.5x=3
x=2
8*(2x-5)=28
2x-5=3.5
2x=8.5
x=4.25
展开全部
(x+16)*2.1=42
x+16=20
x=4
x-0.6x=4.888
0.4x=4.888
x=12.22
16*5-5x=26.5
-5x=-53.5
x=10.7
98.6-0.25x=46.3
-0.25x=-52.3
20.95
x-2.8+2.2=5
x-0.6=5
x=5.6
4.5-1.5x=1.5
-1.5x=-3
x=2
8*(2x-5)=28
2x-5=3.5
2x=8.5
x=4.25
x+16=20
x=4
x-0.6x=4.888
0.4x=4.888
x=12.22
16*5-5x=26.5
-5x=-53.5
x=10.7
98.6-0.25x=46.3
-0.25x=-52.3
20.95
x-2.8+2.2=5
x-0.6=5
x=5.6
4.5-1.5x=1.5
-1.5x=-3
x=2
8*(2x-5)=28
2x-5=3.5
2x=8.5
x=4.25
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