Question

#13-8: Write an equivalent expression for 3(3a-2)+4-a and simplify it. Evaluate the expression if a=-2.

Answer 1

$\huge{\boxed{8a-2}}\ \ \huge{\boxed{-18}}$

Distribute the $3$ to the $(3a-2)$. $9a-6+4-a$

Move the common terms next to each other. $9a-a-6+4$

Combine the variables. $8a-6+4$

Combine the constants. $\boxed{8a-2}$

Substitute in the variable. $8(-2)-2$

Multiply. $-16-2$

Subtract. $\boxed{-18}$

Answer 2

Answer:

-18

Step-by-step explanation:

3(3a - 2) + 4 - a

Simplified becomes;

9a - 6 + 4 - a

= 9a - a - 6 + 4

= 8a - 2

If a = -2 then;

8a - 2 = -16 - 2 = -18