Question

Tentukan nilai x dan y dan persamaan berikut
1. X-Y=4
2X+2Y=8

2. 3X-Y=5
2X+Y=

3. 4X+2Y=20
X+5Y= -4

4. X+Y=5
X+3Y=7

Answer 1

the value of x is 4

and y is 0

Answer 2

Given :  1. X-Y=4   , 2X+2Y=8

2. 3X-Y=5   , 2X+Y=  0

3. 4X+2Y=20  , X+5Y= -4

4. X+Y=5  , X+3Y=7

To Find : Value of x & y

Tentukan nilai x dan y dan persamaan berikut

Solution:

X-Y=4   => 2x - 2y = 8

  2X+2Y=8

2x - 2y + 2x + 2y = 8 + 8

=> 4x = 16

=> x = 4

4 - y = 4

= > y = 0

(x = 4 , y = 0)

3X-Y=5   , 2X+Y=  0

5x = 5

=> x = 1

=> y = - 2

4X+2Y=20  ,

X+5Y= -4   => 4x + 20Y  = -16

=> 18y = -36

=> y = - 2

=> x = 6

(6 , - 2)

X+Y=5  , X+3Y=7

=> 2y = 2

=> y = 1

=> x = 4

( 4 , 1)

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