9x+2y=62 ①
4x+3y=36 ②
由①×3-②×2得19x=114 x=6
将x=6代入①得9×6+2y=62 2y=8 y=4
猜你喜欢
- 1what colour were the leaves in the summer?(根据实际情况回答)
- 2直线y=kx+b经过点(-1,-4),且与正比例函数y=1/2x的图象交于点(m,3),求:(1).m的值; (2).直线y=kx+b的解析式; (3).在(2)的条件下,求y=kx+b与坐标轴所围成的三角形面积.
- 3已知三角形ABC的三个顶点为A(1,2),B(4,1),C(3,4).求AB边上的中线CM的长.(2)在AB上取一点P使
- 4how is the weather like today?
- 5The fish in his picture looks like a()(really)one.
- 6一块长方形铁皮,长32厘米,在它四个顶角分别剪去边长4厘米的正方形,然后折起来焊成一个无盖的长方体铁皮盒.已知这个铁皮盒的容积是768立方厘米.原来这块铁皮的宽是多少厘米?
- 7已知三个连续奇数的和是99,这三个数写成连比是()?说明理由,
- 8苹果:5元3千克,香蕉:10元2千克妈妈打算买6千克苹果和4千克香蕉,应付多少元?
- 9把NH4CI和NH4NO3的混合物11.75克加水配制成100毫升溶液,并从中取出50毫升,加入过量的氢氧化钠溶液加热,
- 10This morning,my father shaved himself and cut himself 翻译