Math 8 Equations Final Review

Simplify the expression:

 $\left[3\cdot\left(9-6\right)\right]+4$  

• 13

• 25

• 10

Simplify the expression:

 $5\left[19+\left(7-4\right)\right]$  

• 98

• 110

• 285

Simplify the expression:

 $4x^2+x-4+x^2+4x-3$  

•  $4x^2+4x-7$  

•  $5x^2+5x-7$  

•  $10x^2-7$  

Select all expressions that are equal to:

 $5\left(-4x+7\right)+8x$  

•  $-20x+7+8x$  

•  $-20x+35+8x$  

•  $-12x+7$  

•  $-12x+35$  

Solve the equation:

 $x+5=-6$  

•  $x=-1$  

•  $x=1$  

•  $x=11$  

•  $x=-11$  

Solve the equation:

 $-9x=-72$  

•  $x=8$  

•  $x=-8$  

•  $x=-63$  

•  $x=-81$  

What is Step 1 to solve the equation:

 $5x+9=-6$  

• Add 9 to both sides

• Subtract 9 from both sides

• Divide both sides by 5

• Multiply both sides by 5

What is Step 2 to solve the equation:

 $5x+9=-6$  

• Add 9 to both sides

• Subtract 9 from both sides

• Divide both sides by 5

• Multiply both sides by 5

What is Step 3 (your answer):

 $5x+9=-6$  

•  $x=\frac{3}{5}$  
  

•  $x=3$  
  

•  $x=-3$  
  

•  $x=-\frac{3}{5}$  
  

What is step 1 to solve the equation:

 $-6-3x=-9$  

• Add 6 to both sides

• Add 9 to both sides

• Add 3 to both sides

• Subtract 6 from both sides

• Divide both sides by -3