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11-01-2017
Mathematics

contestada

3t+u=561

7b+t=906

2b+7t+5u=1758

what are t, u, and b
(give me the numbers)
Show your work

Respuesta :

Menna3aly Menna3aly

11-01-2017

Look, solve it first for" b "
u=561 - 3t
t =906 - 7b
So, 2b+7(906 -7b)+5(561 - 3(906-7b)=1758
gain the b then substitute by the result in the second equation then gain the value of t and solve the first equation.

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