Question

3X + Y + Z = 8
X - Y + Z = 2
2 X + 2 Y + Z = 9
Tentukan harga X dan Y​

Answer 1

To determine the values of X and Y, we can solve the given system of equations using elimination.

**Method 1: Elimination**

1. Add the first and second equations:

```

4X + 2Z = 10

```

2. Subtract the second equation from the third equation:

```

X = 7

```

3. Substitute X = 7 into the first equation:

```

3(7) + Y + Z = 8

21 + Y + Z = 8

Y + Z = -13

```

4. Solve for Y and Z:

```

Y = -13 - Z

```

Substitute this expression for Y in the second equation:

```

X - (-13 - Z) + Z = 2

7 + 13 + Z + Z = 2

2Z = -18

Z = -9

```

5. Substitute Z = -9 back into the expression for Y:

```

Y = -13 - (-9)

Y = -4

```

Therefore, the values of X and Y are X = 7 and Y = -4.

Answer 2

sudah difotoin ya... pahami dan silahkan latihan lagu