1-((3/5)/(16/9)x + 12x -36 =5

X= -2
X= 2

((3/5)/(16/9)(-2)+12(2)-36=

(3/5)/(16/9)=(27/80)(-2/1)=27/160

12(2)-36=24-36

27/160+24/1=27/3840-36/1=27/138=5

2- 13x - 35 +2/7 -15/8 =7

X= -3
X= 3

13(3)=39-35=4/1+2/7=28/2

28/2-15/8=224/30=7

3-21X -16X-18 +23 -65 +79 -45x =16

X= -4
X= 5

21(-4)=84 16(-4)=64 45(5)=225

84-64=20-18=2+23=25-65=40+79=119-45=74(225)=16

4-((9/8)(7/14)/(23/6))x +(1/5)x -19 =817

X= -6
x= 3

(9/8)(7/14)=(126/56)(23/6)=756/1288

(-6/1)+(1/5)=30/1

(756/1288)(30/1)=756/38640

3-19=16

(756/38640)(16/1)=756/618240=817

5-(23/4)(65/6) + (2/3)x -16/5)x +22 =25

X= 5 
X= -7

(2/3)(5/1)=10/4 -16/5)(-7/1)=16/35

(23/4)(65/6)=(138/260)+(10/4)=13/65-16/35=5-2=3+22=25