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受欢迎的代数 >

x+2y-3z=4,y+2z=3,z=1

解答

x + 2 y - 3 z = 4, y + 2 z = 3, z = 1

解答

x = 5, y = 1, z = 1

求解步骤

x + 2 y - 3 z = 4 y + 2 z = 3 z = 1

替代

z = 1

[y + 2 \cdot 1 = 3 x + 2 y - 3 \cdot 1 = 4]

化简

[y + 2 = 3 x + 2 y - 3 = 4]

对于

y + 2 = 3

将

y

移到一边:

y = 1

替代

y = 1

[x + 2 \cdot 1 - 3 = 4]

化简

[x - 1 = 4]

对于

x - 1 = 4

将

x

移到一边:

x = 5

方程组的解为:

x = 5, y = 1, z = 1

流行的例子

5x-y=3,2x+4y=-12

5 x - y = 3, 2 x + 4 y = - 12

2x+4y-2=4,x+8y-10=0

2 x + 4 y - 2 = 4, x + 8 y - 10 = 0

3 b = 3, a = 1

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

7x+3y=15,12y-5x=39

7 x + 3 y = 15, 12 y - 5 x = 39