ceciliachildspdd1v8 ceciliachildspdd1v8
  • 12-08-2018
  • Mathematics
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If 1 is added to a number and the sum is tripled, the result is 15 more than the number.find the number

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konrad509
konrad509 konrad509
  • 12-08-2018

[tex] (x+1)\cdot 3=x+15\\
3x+3=x+15\\
2x=12\\
x=6 [/tex]

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BTS101016 BTS101016
  • 12-08-2018
Equation: 3( 1+x)=x+15

First you need to distribute the left side of the equation.

3+3x=x+15

Now you need to cancel out like terms. You can subtract 1x from both sides first and that leaves you with 3+2x=15. Then you will need the subtract 3 from both sides and that gives you
2x=12. Now you need to divide 2 from both sides and that gives you the final answer of x=6
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