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2x-9x=8+6
-7x=14
x=-2
b)2-2/3x=4⇒sama-sama di kali 3
3(2-2/3x)=3(4)
6-2x=12
-2x=12-6
-2x=6
x=-3
c) 2x-3/ 3 +4x+4/2=2x+3⇒sama-sama di kali 6
2(2x-3+3(4x+4)=6(2x+3)
4x-6+12x+12=12x+18
16x+6=12x+18
16x-12x=18-6
4x=12
x=3
kalo yang no 13nya soalnya ke potong