已知下列各组中的两个方程表示的直线平行,求a的值:left(1right)2x+3y=a,4x+6y-3=0;left(2right)x+2ay-1=0,left(3a-
阅读下列材料并解决相关问题:化简代数式\left| x+5 \right|+\left| 2x-3 \right|的关键在于去掉两个绝对值符号.我们知道,只去掉一个绝对值
2x2+11x−21=0 http://www.tiger-algebra.com/drill/2x~2_11x-21=0/ 2x2+11x-21=0 Two solutions were found : x = -7 x = 3/2 = 1.500 Step by step solution : Step 1 :Equation at the end of step 1 : ...
https://socratic.org/questions/how-do-you-graph-and-solve-2x-abs-x-4-8 x>12 Explanation: 2x−∣x+4∣=8+ϵ2 with ϵ =0 or 2x−8−ϵ2=∣x+4∣ ... How do you solve ∣2x−3∣=−1 ? https://socratic.org/questions/how-do-you-solve-abs-2x-3-1 This has no so...
3.解下列方程组:(1)$\left\{\begin{array}{l}{2x-3y=8}\\{7x-5y=-5}\end{array}\right.$,(2)$\left\{\begin{array}{l}{\frac{2}{3}x+\frac{3}{4}y=0.5}\\{\frac{4}{5}x+\frac{5}{6}y=\frac{7}{15}}\end{array}\right.$,(3)$\left\{\begin{array}{l}{\frac{x}{...
最论济界眼解下列不等式:最论济界眼(1)最论济界眼\left| 2x \right|\leqslant 3.最论济界眼(2)最论济界眼\left| 2x-1 \right
青现参准深断青现参准深断青现参准深断青现参准深断已知f(x)=\left( x-1 \right)\left( 2x-1 \right)\left( 3x-1 \righ
5(2x−3x)=4 解x x=−54=−0.8 圖表 共享 復制 已復制到剪貼板
http://tiger-algebra.com/drill/x~2-2x-3/ x2-2x-3 Final result : (x + 1) • (x - 3) Step by step solution : Step 1 :Trying to factor by splitting the middle term 1.1 Factoring x2-2x-3 The first term is, x2 its coefficient is ... ...
16.已知不等式组:$\left\{\begin{array}{l}3<2x+8\\ 2+\frac{3(x+1)}{8}>3-\frac{x-1}{4}\end{array}\right.$(1)求此不等式组的整数解,(2)若上述整数解满足不等式ax+6≤x-2a.化简|a+1|-|a-1|.