Explanation:
Here what we know
a+b+c=183
b=a+2
c=a+4
Now we put those values into our variables
a+(a+2)+(a+4)=183
Simplify
3a+6=183
Isolate a, starting by subracting 6 by both sides
3a=179
Divide both sides by 3:
a=59
Check
59+61+63=183
183=183
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