3. Introduction to Solving Equations and Problem Solving

Multiply.

$3\left(4x^{2}yz\right)$

Simplify the expression.

$11a+5-3b+2a+9b$

Multiply.

$-5(-9x^2)$

Multiply.

$12\left(5b\right)$

Simplify the expression.

$-3(x+6)+5(11-9x)$

Simplify the expression.

$2c+3(7+c)-9$

Simplify the expression.

$8+6(5-3y)$

Simplify by combining like terms.

(A) $3b+4b+b$

Multiply.

$6(8+9z)$

Multiply.

$-5\left(7x\right)$

Simplify by combining like terms.

(B) $10x+6-2x$

Multiply.

$-1(y+2x+3)$