Question 111556


{{{x+(x+1)+(x+2)=12}}} Start with the given equation



{{{3x+3=12}}} Combine like terms on the left side



{{{3x=12-3}}}Subtract 3 from both sides



{{{3x=9}}} Combine like terms on the right side



{{{x=(9)/(3)}}} Divide both sides by 3 to isolate x




{{{x=3}}} Divide


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Answer:

So our answer is {{{x=3}}} 



Since x=3, this means x+1 is


{{{(3)+1=4}}} 


and x+2 is 


{{{(3)+2=5}}}


So our three numbers are 3,4, and 5



Notice how the sum of 3,4 and 5 is



{{{3+4+5=7+5=12}}}


So this verifies our answer.