Question

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Answer 1

Răspuns:

1. 6X+12=588

  6X=588-12=576

    X=576/6

    X=96

2. 11-X+29=21

   11-X=-8

   -X= -19 | *(-1)

   X=19

3. 5X+5-4X=3

   X+5=3

   X=3-5= -2

4. 4X+12+1=25

   4X+13=25

   4X=12

     X=3

5. 8X+2=6X+3+4X

   8X+2=10X+3

   -2X= -1 |*(-1)

    2X=1

      $X=\frac{1}{2}$

II.

a) ...=1-2$\sqrt{2}$X+2X

b) ...=$x^{2}$-4XY+4$y^{2}$