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3(x+5)=4(x-1)
3x+15=4x-4
3x-4x=-15-4
-x=-19
x=-19/-1
x=1
3 dihasilkan dari 1/2*6=3
sama dengan yang 4
5/2+2/3=2/3x-1/2x
19/6=1/6x
19/6:1/6=x
19/6*6/1=x
19=x
=)