Answered

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Solve using the addition principle. Don’t forget to perform a check. -9+x=-12The solution is x = __

Sagot :

Using the addition principle which states that:

[tex]\text{If a = b, then a+c=b+c}[/tex]

In our case, we add 9 to both sides to get:

[tex]\begin{gathered} -9+x=-12 \\ -9+x+9=-12+9 \\ x=-3 \end{gathered}[/tex]

Performing our check,

[tex]\begin{gathered} -9+x=-12 \\ -9+(-3)=-9-3=-12 \end{gathered}[/tex]

Therefore, x = -3

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