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2x+8 = x-12
2x-x = -12-8
x = -20
b)
2.(x-8) = 10-x
2.x+2.(-8) = 10-x
2x-16 = 10-x
2x+x = 10+16
3x = 26
x = 26/3
x = 8 2/3
c)
2x-3/5 = 1+2x/6
kdua ruas kalikan dg 30, didapat :
60x-18 = 30+10x
60x-10x = 30+18
50x = 48
x = 48/50
x = 24/25