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making equation -0.4a + 3 = 7 a = ?

Answer :

[tex]-0.4a+3=7[/tex]

Solve for a:

Subtract 3 from both sides:

[tex]\begin{gathered} -0.4a+3-3=7-3 \\ -0.4a=4 \end{gathered}[/tex]

Divide both sides by -0.4:

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