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15-02-2018
Geography

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let p be the point between points s and t on st if st=21, sp=3b- 11 and pt=b+4, solve for b

Respuesta :

15-02-2018

ST=21, SP=3b-11, PT=B+4
ST=SP+PT
21=(3b-11)+(b+4)
21=3b-11+b+4
21=4b-7
21+7=4b
4b=28
b=7

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