Circle Theorems

Which is the correct way to solve this?

• 70=(180+x)/2
• 70=(180-x)/2
• x=(180+70)/2
• x=(180-70)/2

Which is the correct way to solve this?

• x=(360-110)/2
• x=110/2
• x=(250-110)/2
• x=(250+110)/2

Which is the correct way to solve this?

• x=(142-72)/2
• x=(142+72)/2
• 72=(142-x)/2
• 72=(142+x)/2

Which is the correct way to solve this?

• x=(62-50)/2
• x=(62+50)/2
• 50=(62+x)/2
• 62=(50+x)/2

Which is the correct way to solve this?

• 210=x/2
• x=210/2
• x=150/2
• 150=x/2

Which is the correct way to solve this?

• 8x=12
• 12x=8
• 8(x+8)=12
• 8(x+8)=12(12)

Which is the correct way to solve this?

• x(x+14)=12(33)
• 14x=12(21)
• 12x=14(21)
• 21x=(12)(14)

Which is the correct way to solve this?

• 7x=6(8)
• 7(x+7)=6(14)
• 6x=7(8)
• 7(14)=6(6+x)

Which is the correct way to solve this?

• 3x+13=-3+5x
• 3x+13+19.3=-3+5x
• (3x+13)(-3+5x)=19.3
• 3x+13+-3+5x=19.3

What is the value of x?