Respuesta :

Answer:

                     

Explanation:

                     

astar9

Answer:

We have,:

A=80+B

A=120+C

A+B+C=820

It is a system of equations so:

80+B=120+C

B=40+C

120+C+40+C+C=820

3C=820-160

3C=660

C=220

C=220A=120+220=340

C=220A=120+220=340B=340-80=260

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