Question

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Answer 1

Answer:

Step-by-step explanation:

1) 3x - 5 - x + 9 = 2x + 4

Now putting x = 3 in the above equation

2x + 4 = 2 × ( 3 ) + 4 = 6 + 4 = 10 .

2) 2 - 8x + 4x + 4 = - 4x + 6

Now putting x = 3 in the above equation

- 4x + 6 = - 4 × ( 3 ) + 6 = - 24 + 6 = - 18.

3) 3a + 5 - 8a + 1 = - 5a+ 6

Now putting a = - 1 in the above equation

- 5a + 6 = - 5 × ( - 1 ) + 6 = 5 + 6 = 11. ( - × - = + )

4) 10 - 3b - 4 - 5b = - 8b - 14

Now putting b = - 2 in the above equation

- 8b - 14 = - 8 × ( - 2 ) - 14 = 16 - 14 = 2. ( - × - = + )

5) 2a - 2b - 4 - 5 + a = 3a - 2b - 9

Now putting a = - 1 and b = - 2 in the above equation

3a - 2b - 9 = 3 × ( - 1) - 2 × ( - 2 ) - 9

= -3 + 4 - 9 ( + × - = - ; - × - = + )

= - 12 + 4

= - 8.

Answer 2

Answer:

X=3

3X - 5 - X + 9

9-5-9+9=4

Answer is 4

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