anna8352 anna8352

06-02-2019
Mathematics

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Help me !! for algebra :*(

Help me for algebra class=

Respuesta :

08-02-2019

Let 1 = a, 2 =b and 3 = c

a = 1/2b
c = a + b
a+b+c = 180

By substitution

2c = 180
c = 90

a+b = 90 by substitution of c into 3rd equation

By substitution
3/2b = 90

b = 60

a = 30

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