Answer:
[tex]The answer is 28.a+b=13 b+c=24 c+a=19 Add them all together and halve the result.a+b+b+c+c+a=13+24+19 ⟹2a+2b+2c=56 ⟹2(a+b+c)=2(28) a+b+c=28Or, we can do it the hard way.a+b+b+c−c−a=13+24−19 ⟹2b=18 ⟹b=9 a+b=13⟹a+9=13⟹a=4 b+c=24⟹9+c=24⟹c=15 4+9+15=28[/tex]
Step-by-step explanation:
