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8x + 3 = 3x + 23
8x - 3x = 23 - 3
5x = 20
x = 20/5
x = 4
Solución :
x = 4
VERIFICAMOS :
8x - 4 + 7 = 18 + 3x + 5
8 (4) - 4 + 7 = 18 + 3 (4) + 5
32 - 4 + 7 = 18 + 12 + 5
32 + 3 = 35
35 = 35
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