Answer:
8. x=18 9. x=33 10. x=65 11. x=19 12. x=59
Step-by-step explanation:
8. The angles are essentially vertical so they have to be equal to each other.
42=2x+6 subtract 6 from both sides 36=2x x=18
9. These angles are supplementary and equal 180 when added together.
98+(3x-17)=180 subtract 98 and add 17 to both sides 3x=99 x=33
10. Angles are essentially vertical so they are equal to each other.
2x+2=3x-63 add 63 to both sides subtract 2x from both sides 65=1x
11. Angles are supplementary so they equal 180 when added together.
112+(4x-8)=180 subtract 112 and add 8 to both sides 4x=76 x=19
12. Angles are vertical so they are equal to each other.
(3x-33)=(2x+26) add 33 to both sides and subtract 2x 59=1x
