ariana524 ariana524

19-01-2021
Mathematics

contestada

— 4х + 7y = 20
у = 3х + 15

Respuesta :

Аноним Аноним

19-01-2021

Answer:

x=-5

Step-by-step explanation:

[tex]-4x+7(3x+15)=20\\ -4x+21x+105=20\\ 17x+105=20\\ 17x=20-105\\ 17x=-85\\ x=-5[/tex]

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