Respuesta :

lLillith

Answer:

a-x=7.5

b=x=1

Step-by-step explanation:

-x2 on either side.

add 1 on either side

subtract 2x on either side

divide by 2

15=2x

-x3 on either side

subtract 6 on either side

subtract 2x on either side

divide by 7

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