Final answer to the problem
$a=-2$
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Step-by-step Solution
Specify the solving method
1
Add the values $5$ and $7$
$-\left(8a-9\right)-3=12+1\cdot -5a$
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$-\left(8a-9\right)-3=12+1\cdot -5a$
Learn how to solve problems step by step online. Solve the equation -(8a-9)-3=5+1*-5a+7. Add the values 5 and 7. Multiply 1 times -5. Simplify the product -(8a-9). Subtract the values 9 and -3.
Final answer to the problem
$a=-2$