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Mathematics
Juliet Blair
21 December, 19:19
A + b + c = 180
b = 3a
c = 5a
Whats B
+4
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2
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Slade Vazquez
21 December, 19:49
0
Sub
b=3a so put 3a for every b
c=5a so put 5a for every c
a+3a+5a=180
9a=180
divide 9 both sides
a=20
b=3a
b=3 (20)
b=60
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Nick Fox
21 December, 22:15
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Plug 3a for b and 5a for c
a + 3a + 5a = 180
9a = 180
a = 20
b = 3 x a = 3 x 20
b = 60
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