Solving Equations Using Angle Relationships

Find the value of x.

• 15

• 16

• 18

• 19

Tell whether the angles are complementary or supplementary. Then find the value of x.

• Complementary; x=25
• Complementary; x=5
• Supplementary; x=25
• Supplementary; x=5

Find the value of x.

• 14
• 60
• 35
• 180

• 2x-6=7x+4
• 2x-6+7x+4=90
• 2x-6+7x+4=180
• 2x-6+7x+4=360

Find the value of x

• -5
• 28
• 19
• -3

Then find the value of x.

• x=3.4
• x=45
• x=20
• x=175

• 2x-6=7x+4
• 2x-6+7x+4=90
• 2x-6+7x+4=180
• 2x-6+7x+4=360

• 20°

• 30°

• 40°

• 60°

What is the value of x in the figure below?

• 18°

• 22°

• 45°

• 30°

• x=78
• x=110
• x=98
• x=58