Question

1)Qual a solução de cada equação?


A)2×=18 C)2×+2=42 B)×+3=0​

Answer 1

A)

• $\sf{2x= 18}$

• $\sf{x=\dfrac{18}{2}}$

• $\boxed{x= 9}$

C)

• $\sf{2x+2=42}$

• $\sf{2x=42-2}$

• $\sf{2x=40}$

• $\sf{x=\dfrac{40}{2}}$

• $\boxed{x=20}$

B)

• $\sf{x+3=0}$

• $\boxed{x=-3}$