lewistrenton lewistrenton
  • 20-04-2021
  • Mathematics
contestada

The sum of a number and 1/2 the number is 45. Find the number

Respuesta :

chemistryfan63
chemistryfan63 chemistryfan63
  • 20-04-2021

Answer:

30 and 15.

Step-by-step explanation:;

let x be the number we are trying to find. setting up an equation we get:

[tex]x+\frac{x}{2}=45[/tex]

solve for x to get the original number:

[tex]x\cdot \:2+\frac{x}{2}\cdot \:2=45\cdot \:2[/tex]

[tex]3x=90[/tex]

[tex]\frac{3x}{3}=\frac{90}{3}[/tex]

[tex]x=30[/tex]

[tex]\frac{30}{2} =15[/tex]

the number is 30 and 1/2 of that number is 15.

Hope this helped.

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