Question 667273
b = 34 + 3a
c = 56+a
a+b+c = 180
...
a + 34+3a + 56+a = 180
Combine like terms
5a = 180 - 34 - 56
5a = 90
{{{highlight_green(a = 18)}}}
...
b = 34 + 3(18) = {{{highlight_green(88)}}}
...
c = 56 + 18 = {{{highlight_green(74)}}}
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