1. PN2. MN3. CD = 84. AC = 85. KJ = 96. IK = 107. DF = 188. PQ = 159. x = 5 10. x = -911. x = 1212. x = 1213. LN = 1614. RQ = 515. SR = 616. VW = 6
#3-8 is simply halving or doubling.
9. 2(2x-3) = x+9
4x+6=x+9
3x=15
x=5
10. 2(x+19)=x+29
2x+38=x+29
x=-9
11. 2(x+2)=3x-8
2x+4=3x-8
x=12
12. 2(x-3)=x+6
2x-6=x+6
x=12
13.2(x+2)=x+10
2x+4=x+10
x=6
LN=6+10=16
14. 2(x-2)=x+3
2x-4=x+3
x=7
RQ=7-2=5
15. 2(2x-14)=x+2
4x-28=x+2
3x=30
x=10
SR=2(10)-1420-14=6
16. 2(x+15)=-2x-6
2x+30=-2x-6
4x=-36
x=-9
VW=6