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4 + 8x = 24 8x = 24 - 4 8x = 20 x = 20 / 8 = 10 / 4 = 5 / 2 x = 5 / 2 Comprobación : 4 + 8(5 / 2) = 24 4 + 40 / 2 = 24 4 + 20 = 24 24 = 24 3x + 2x - 3 = 0 5x = 3 x = 3 / 5 Comprobación : 3(3 / 5) + 2(3 / 5) - 3 = 0 9 / 5 + 6 / 5 - 3 = 0 15 / 5 - 3 = 0 3 - 3 = 0 0 = 0.

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Eri10
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4 + 8x = 24

8x = 24 - 4

8x = 20

x = 20 / 8 = 10 / 4 = 5 / 2

x = 5 / 2

Comprobación :

4 + 8(5 / 2) = 24

4 + 40 / 2 = 24

4 + 20 = 24

24 = 24

3x + 2x - 3 = 0

5x = 3

x = 3 / 5

Comprobación :

3(3 / 5) + 2(3 / 5) - 3 = 0

9 / 5 + 6 / 5 - 3 = 0

15 / 5 - 3 = 0

3 - 3 = 0

0 = 0.