Question

解方程，要有过程

3x+2y+z=44
2x+3y+4z=51

Answer 1

5X-3 =-X +3
5倍+ X = 3 +3

6X = 6

X = 1

4Y-7 = 2017-9 4Y-6Y = -9 7

-2Y = -2

为y = 1

5（X-1）= 3（X +1）
> 5X-5 = 3X +3

5倍到3倍= 3 +5

2X = 8

X = 4

2x-1/3-3x-4 / 4 = 1

8X-4-9X +12 = 12

-X = 4

X = -4

-3（2X +1）+1 = -4（5-3X）

-6X-3 +1 = -20 +12 x

-18X = -18

X = 1

5倍+ 4/6 = X-3/4 1

10×8 = 3X-9 12

7X = -5
X = -5 / 7

追问

?

x+y+z=?

Answer 2

x+y+z=20

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