3x-18=0

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3x-18=0Isolate the quantity containing the variable,x, by adding 18 to both sides of the equation3x-18=03x-18+18=0+183x+0=183x=18Now divide both sides by 33x/3=18/3x=6Check: Replace x by 6 in the original equation3(6)-18=18-18=0 which checks out.