Setting up algebra for parallel lines with a transversal

If $m\angle1\ =\ 3x\ +\ 9\$  and the  $m\angle4\ =\ 9x\ -\ 45$  What would your equation look like to solve for x?

• 3x + 9 = 9x - 45

• 3x + 9 + 9x - 45 = 180
  

• 3x + 9 - (9x - 45) = 180
  

• None of the above

Tags

CCSS.7.G.B.5

If $m\angle1\ =\ 3x\ +\ 9\$  and the  $m\angle5\ =\ 2x\ +\ 23$  What would your equation look like to solve for x?

• 3x + 9 = 2x + 23

• 3x + 9 + 2x + 23 = 180
  

• 3x + 9 - (2x + 23) = 180
  

• None of the above

Tags

CCSS.7.G.B.5

If $m\angle1\ =\ 3x\ +\ 9\$  and the  $m\angle6\ =\ x\ +\ 55$  What would your equation look like to solve for x?

• 3x + 9 = x + 55

• 3x + 9 + x + 55 = 180
  

• 3x + 9 - (x + 55) = 180
  

• None of the above

Tags

CCSS.7.G.B.5

If $m\angle1\ =\ 3x\ +\ 9\$  and the  $m\angle8\ =\ 4x\ -12$  What would your equation look like to solve for x?

• 3x + 9 = 4x - 12

• 3x + 9 + 4x - 12 = 180
  

• 3x + 9 - (4x - 12) = 180
  

• None of the above

Tags

CCSS.7.G.B.5

If $m\angle1\ =\ 3x\ +\ 9\$  and the  $m\angle7\ =\ 6x\ -\ 30$  What would your equation look like to solve for x?

• 3x + 9 = 6x - 30

• 3x + 9 + 6x - 30 = 180
  

• 3x + 9 - (6x - 30) = 180
  

• None of the above

Tags

CCSS.7.G.B.5

If $m\angle1\ =\ 3x\ +\ 9\$  and the  $m\angle3\ =\ 5x\ -\ 18$  What would your equation look like to solve for x?

• 3x + 9 = 5x - 18

• 3x + 9 + 5x - 18 = 180
  

• 3x + 9 - (5x - 18) = 180
  

• None of the above

Tags

CCSS.8.G.A.5

If $m\angle8\ =\ 4x\ -12$ and  $m\angle4\ =\ 3x\ +\ 2$   What would your equation look like to solve for x?

• 4x - 12 = 3x + 2

• 4x - 12 + 3x + 2= 180
  

• 4x - 12 - (3x + 2) = 180
  

• None of the above

Tags

CCSS.8.G.A.5

If $m\angle1\ =\ 3x\ +\ 9\$  and the  $m\angle2\ =2x\ +\ 55$  What would your equation look like to solve for x?

• 3x + 9 = 2x + 55

• 3x + 9 +2 x + 55 = 180
  

• 3x + 9 - (2x + 55) = 180
  

• None of the above

Tags

CCSS.7.G.B.5

If $m\angle12=45$  and  $m\angle9=9x$  What is the equation to find x?

• 45 + 9x = 180

• 45 = 9x
  

• 45 - 9x = 180

• none of the above

Tags

CCSS.8.G.A.5

If $m\angle12=45$  and  $m\angle6=9x$  What is the equation to find x?

• 45 + 9x = 180

• 45 = 9x
  

• 45 - 9x = 180

• none of the above

Tags

CCSS.8.G.A.5