Explicación paso a paso:
-4x = 18 - 30
x = -12/-4
COMPROBACIÓN
-4(3) + 30 = 18
-12 + 30 = 18
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Explicación paso a paso:
-4x = 18 - 30
x = -12/-4
x = 3
COMPROBACIÓN
-4(3) + 30 = 18
-12 + 30 = 18
18 = 18 ✔️