Simplify -a+(-3a)+15+5a-(-2)

$- a + (- 3 a) + 15 + 5 a - (- 2)$

Step 1

Simplify the expression.

Remove parentheses.

$- a - 3 a + 15 + 5 a - (- 2)$

Multiply $- 1$ by $- 2$ .

$- a - 3 a + 15 + 5 a + 2$

$- a - 3 a + 15 + 5 a + 2$

Step 2

Subtract $3 a$ from $- a$ .

$- 4 a + 15 + 5 a + 2$

Step 3

Add $- 4 a$ and $5 a$ .

$a + 15 + 2$

Step 4

Add $15$ and $2$ .

$a + 17$

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