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-28 = -7(3x + 4) +21x

Sagot :

Answer:

1 Expandir.

-28=-21x-28+21x

−28=−21x−28+21x

2 Simplifica  -21x-28+21x−21x−28+21x  a  -28−28.

-28=-28

−28=−28

3 Ya que ambos lados son iguales, hay infinitas soluciones.

Soluciones Infinitas

Step-by-step explanation: