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UsukiDoll
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distribute 3 and solve for x

TheViper
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3(x2)=15
3x+6=15
3x=156=9
x=9/3=3

TheViper
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got it ?

shivraj
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yes

UsukiDoll
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dw:1348814800899:dw

zorozoro
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3(x2)=15 then it should be 3x+6=15 then if you take the 6 to other site of equation it should be 3x=9 then divide each side to 3 so we have x=3