adzy5678
adzy5678
25-02-2021
Mathematics
contestada
I dont know how to solve this
Respuesta :
liamsic
liamsic
25-02-2021
angles of a triangle add up to 180°
since we already have 47°, 180-47=133
combine the other sides so
(15+x)+(18+4x)=133
33+5x=133
133-33=100
5x=100
100/5=20
x=20
and that's it, x is equal to 20
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