Question

a+b=160
b+c=134
a+c=146

Answer 1

$a+b = 160 \\ \\ b+c=134 \\ \\ a+c=146 \\ \\ a=160-b \\ c=134-b \\ =\ \textgreater \ 160-b+134-b=146 \\ 294-2b=146 \\ -2b=146-294 \\ -2b=-148 \\ b= 74 \\ a=160-74=86 \\ a=86 \\ c=134-74=60 \\ c=60$

Answer 2

$a+b=160 \\ b+c=134 \\ a+c=146 \\ a+b+b+c+a+c=160+134+146 \\ 2a+2b+2c=440 \\ 2*(a+b+c)=440 \\ a+b+c=\frac{440}{2} \\ a+b+c=220 \\ 160+c=220 \\ c=220-160 \\ c=60 \\ 60+b=134 \\ b=134-60 \\ b=74 \\ 74+a=160 \\ a=160-74 \\ a=86$