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Exercise

$-\left(3a-12b\right)-3\left(b+5a\right)$

Step-by-step Solution

1

Simplify the product $-(3a-12b)$

$-3a+12b-3\left(b+5a\right)$
2

Multiply the single term $-3$ by each term of the polynomial $\left(b+5a\right)$

$-3a+12b-3b-15a$
3

Combining like terms $-3a$ and $-15a$

$-18a+12b-3b$
4

Combining like terms $12b$ and $-3b$

$-18a+9b$

Final answer to the exercise

$-18a+9b$

Try other ways to solve this exercise

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