Sea cuadernos: x
32x + 54 = 40x - 2
54 + 2 = 40x - 32x
56 = 8x
56/8 = x
7 = x
Reemplazamos en la ecuacion:
32(7) + 54 = 40(7) - 2
224 + 54 = 280 - 2
278 = 278
Tenía $278
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Sea cuadernos: x
32x + 54 = 40x - 2
54 + 2 = 40x - 32x
56 = 8x
56/8 = x
7 = x
Reemplazamos en la ecuacion:
32x + 54 = 40x - 2
32(7) + 54 = 40(7) - 2
224 + 54 = 280 - 2
278 = 278
Tenía $278