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受欢迎的代数 >

1/7 x+y/3 =5, x/2-y/9 =6

解答

\frac{1}{7} x + \frac{y}{3} = 5, \frac{x}{2} - \frac{y}{9} = 6

解答

x = 14, y = 9

求解步骤

[\frac{1}{7} x + \frac{y}{3} = 5 \frac{x}{2} - \frac{y}{9} = 6]

对于

\frac{1}{7} x + \frac{y}{3} = 5

将

x

移到一边:

x = 35 - \frac{7 y}{3}

替代

x = 35 - \frac{7 y}{3}

[\frac{35 - \frac{7 y}{3}}{2} - \frac{y}{9} = 6]

化简

[\frac{315 - 23 y}{18} = 6]

对于

\frac{315 - 23 y}{18} = 6

将

y

移到一边:

y = 9

对于

x = 35 - \frac{7 y}{3}

替代

y = 9

x = 35 - \frac{7 \cdot 9}{3}

35 - \frac{7 \cdot 9}{3} = 14

x = 14

方程组的解为:

x = 14, y = 9

作图

流行的例子

3 x + 2 y = 5, x - 3 y = 9

3x+2x+z=6,3x+y+z=5,x+y+z=3

3 x + 2 x + z = 6, 3 x + y + z = 5, x + y + z = 3

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

6x-3y+10=0,2-y+9=0

6 x - 3 y + 10 = 0, 2 - y + 9 = 0

2y-x=8,5y-x=1,4y-2x=1

2 y - x = 8, 5 y - x = 1, 4 y - 2 x = 1