Answer:
x=4 and ST =6
Explanation:
16=x+2+x-1+x+3
16 =3x+4
3x=12
x=12/3
×=4
ST=x+2
=4+2 (x=4)
=6
x+2 +x-1 +x+3 =16
3x+4=16
3x=16-4
x=4
ST is 4+3 =7
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