danverbic danverbic

07-10-2018
Mathematics

contestada

Find a, (x-3) + (x-a) = 15

Respuesta :

jimrgrant1 jimrgrant1

07-10-2018

a = 2x - 18

remove the parenthesis and simplify

x - 3 + x - a = 15

2x - 3 - a = 18 ( add 3 to both sides

2x - a = 18 ( subtract 2x from both sides )

- a = 18 - 2x ( multiply through by - 1 )

a = - 18 + 2x

a = 2x - 18

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