1 Answer

Seabass · Answer 1 · 2022-08-22T06:20:11+0000

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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