txxanna5 txxanna5

26-10-2020
Mathematics

contestada

does anyone know how to use substitution for
x+y=21
2x-15=y

Respuesta :

camigirl8219 camigirl8219

26-10-2020

Answer:

Step-by-step explanation:

Replace x

x=-y+21

2(-y+21)-15=y

Then solve the rest

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