Question 703171
(HJ=3x+7 )*2

(HJ=2x +19)*3
_________
2HJ=6x+14___________(1)

3HJ=6x +57__________(2)
___________subtract (2)-(1)

HJ=43
sub  in HJ=3x+7 
43=3x+7
3x=43-7
x=(43-7)/3
x=12
do the same for
 IK=6x-11 

 IK=3x+22

see u
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