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受欢迎的代数 >

4s+2y=8,5s-3y=4

解答

4 s + 2 y = 8, 5 s - 3 y = 4

解答

s = \frac{16}{11}, y = \frac{12}{11}

求解步骤

[4 s + 2 y = 8 5 s - 3 y = 4]

对于

4 s + 2 y = 8

将

s

移到一边:

s = \frac{4 - y}{2}

替代

s = \frac{4 - y}{2}

[5 \cdot \frac{4 - y}{2} - 3 y = 4]

化简

[\frac{20 - 11 y}{2} = 4]

对于

\frac{20 - 11 y}{2} = 4

将

y

移到一边:

y = \frac{12}{11}

对于

s = \frac{4 - y}{2}

替代

y = \frac{12}{11}

s = \frac{4 - \frac{12}{11}}{2}

\frac{4 - \frac{12}{11}}{2} = \frac{16}{11}

s = \frac{16}{11}

方程组的解为:

s = \frac{16}{11}, y = \frac{12}{11}

作图

流行的例子

3x+4=6,2x-2y=-4

3 x + 4 = 6, 2 x - 2 y = - 4

7 x + 8 = 9, - 5 x = 17

-6x+6y=6,-x+y=1

- 6 x + 6 y = 6, - x + y = 1

9 b = 200, a = 11

5x+3y=11,3x-y=-1

5 x + 3 y = 11, 3 x - y = - 1