Question

Find the value of 5u + 8 given that -13u - 4 = 9

Answer 1

Answer:

3

-13u -4_9

-13u _13

u_-1

5u+8

5(-1)+8

-5+8

+3

Answer 2

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$solving \: the \: given \: equation \\ - 13u - 4 = 9 \\ - 13u = 13 \\ u = - 1 \: \\ we \: get \: the \: value \: of \: u \: put \: it \: in \: the \: first \: equation \\ \\ 5( - 1) + 8 \\ - 5 + 8 = 3$

hence the answer is 3.