请问,这三道一元一次方程的题目做对了吗?一:10X-4(3X+3)=12+(X-7))10X-12X+12=12X-8410X-12X-12X=-84-12-14X=-96X=-6.86(用四舍五入法,只要小数点后两位的数)二:4X+3(2X+1)=70-(X+6)4X+6X+3=70X+4204X+6X-70X=420-3-60X=417X=-
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/04 01:39:26
![请问,这三道一元一次方程的题目做对了吗?一:10X-4(3X+3)=12+(X-7))10X-12X+12=12X-8410X-12X-12X=-84-12-14X=-96X=-6.86(用四舍五入法,只要小数点后两位的数)二:4X+3(2X+1)=70-(X+6)4X+6X+3=70X+4204X+6X-70X=420-3-60X=417X=-](/uploads/image/z/2000642-50-2.jpg?t=%E8%AF%B7%E9%97%AE%2C%E8%BF%99%E4%B8%89%E9%81%93%E4%B8%80%E5%85%83%E4%B8%80%E6%AC%A1%E6%96%B9%E7%A8%8B%E7%9A%84%E9%A2%98%E7%9B%AE%E5%81%9A%E5%AF%B9%E4%BA%86%E5%90%97%3F%E4%B8%80%EF%BC%9A10X-4%283X%2B3%29%3D12%2B%28X-7%29%2910X-12X%2B12%3D12X-8410X-12X-12X%3D-84-12-14X%3D-96X%3D-6.86%28%E7%94%A8%E5%9B%9B%E8%88%8D%E4%BA%94%E5%85%A5%E6%B3%95%2C%E5%8F%AA%E8%A6%81%E5%B0%8F%E6%95%B0%E7%82%B9%E5%90%8E%E4%B8%A4%E4%BD%8D%E7%9A%84%E6%95%B0%29%E4%BA%8C%EF%BC%9A4X%2B3%282X%2B1%29%3D70-%28X%2B6%294X%2B6X%2B3%3D70X%2B4204X%2B6X-70X%3D420-3-60X%3D417X%3D-)
请问,这三道一元一次方程的题目做对了吗?一:10X-4(3X+3)=12+(X-7))10X-12X+12=12X-8410X-12X-12X=-84-12-14X=-96X=-6.86(用四舍五入法,只要小数点后两位的数)二:4X+3(2X+1)=70-(X+6)4X+6X+3=70X+4204X+6X-70X=420-3-60X=417X=-
请问,这三道一元一次方程的题目做对了吗?
一:10X-4(3X+3)=12+(X-7))
10X-12X+12=12X-84
10X-12X-12X=-84-12
-14X=-96
X=-6.86(用四舍五入法,只要小数点后两位的数)
二:4X+3(2X+1)=70-(X+6)
4X+6X+3=70X+420
4X+6X-70X=420-3
-60X=417
X=-6.95
三8X-3(3X+2)=6
8X-9X+6=6
X=-1
请问,这三道一元一次方程的题目做对了吗?一:10X-4(3X+3)=12+(X-7))10X-12X+12=12X-8410X-12X-12X=-84-12-14X=-96X=-6.86(用四舍五入法,只要小数点后两位的数)二:4X+3(2X+1)=70-(X+6)4X+6X+3=70X+4204X+6X-70X=420-3-60X=417X=-
一:第二步错了,应该是10x-12x-12=12+x-7
-2x-12=5+x
-2x-x=5+12
-3x=17
x=-17/3=-5.67
二:4X+6X+3=70-X-6 三:8X-9X-6=6
4X+6X+X=-6-3 -x=12
11X=-9 x=-12
X=-0.82
你要加油啊,其实方程很重要的,细心一点,争取下次作对!