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受欢迎的代数 >

5x-3y=26,4x+2y=34

解答

5 x - 3 y = 26, 4 x + 2 y = 34

解答

x = 7, y = 3

求解步骤

[5 x - 3 y = 26 4 x + 2 y = 34]

对于

5 x - 3 y = 26

将

x

移到一边:

x = \frac{26 + 3 y}{5}

替代

x = \frac{26 + 3 y}{5}

[4 \cdot \frac{26 + 3 y}{5} + 2 y = 34]

化简

[\frac{104 + 22 y}{5} = 34]

对于

\frac{104 + 22 y}{5} = 34

将

y

移到一边:

y = 3

对于

x = \frac{26 + 3 y}{5}

替代

y = 3

x = \frac{26 + 3 \cdot 3}{5}

\frac{26 + 3 \cdot 3}{5} = 7

x = 7

方程组的解为:

x = 7, y = 3

作图

流行的例子

3/x+2/y =0,7x-y+2=0

\frac{3}{x} + \frac{2}{y} = 0, 7 x - y + 2 = 0

i+4jyv=5i+j,u=2

i + 4 j y v = 5 i + j, u = 2

2x+3y=15,4x-5y=10

2 x + 3 y = 15, 4 x - 5 y = 10

x= 2/3 ,x= 5/3 ,x= 2/7

x = \frac{2}{3}, x = \frac{5}{3}, x = \frac{2}{7}

2x+y=-4,x+2z=-5,2y+z=-6

2 x + y = - 4, x + 2 z = - 5, 2 y + z = - 6