3x + 20 = x + 12
3x + x = 20 + 12
4x = 32
x = 32 / 4
x = 8
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Respuesta:
3x + 20 = x + 12
3x + x = 20 + 12
4x = 32
x = 32 / 4
x = 8
Verified answer
3x+20=x+123x-x=12-20
2x=-8
X=-4