carlie04 carlie04

17-12-2017
Mathematics

contestada

what is the difference of 3 times a number and 18 is 39. what is the number

Respuesta :

quiltedflowers quiltedflowers

17-12-2017

first, write out the equation

3x-18=39

it's much easier to solve it this way

then, get x alone

(3x-18)+18=39+18

3x=57

3x/3=57/3

so, x=19

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