What is the answer to -19+2z=-21-21 ?

The answer to -19+2z=-21-21 is z=-23/2

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-19+2z=-21-21

- 19 + 2 z = - 21 - 21

z = - \frac{23}{2}

Decimal Notation

z = - 11.5

Solution steps

- 19 + 2 z = - 21 - 21

Subtract the numbers:

- 21 - 21 = - 42

- 19 + 2 z = - 42

Move

19

to the right side

2 z = - 23

Divide both sides by

2

z = - \frac{23}{2}

x^{2} - 5 x - 3 = (3 - x)^{2}

- 4 (2 x - 5) - (7 - 3 x) = 4 (x + 3)

5 - (x - 4) = 3 (x + 2)

25 + 4 x = 7 (x + 7)

x, 4 y - x y = 9