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son4ous [18]
3 years ago
8

Solve for u. 4u = 16u + 3(–3u − 5) u =

Mathematics
2 answers:
marta [7]3 years ago
8 0

Answer:

u = 5

Step-by-step explanation:

<u>→Distribute the 3 to (-3u - 5):</u>

4u = 16u - 9u - 15

<u>→Add like terms:</u>

4u = 7u - 15

<u>→Subtract 4u from both sides:</u>

0 = 3u - 15

<u>→Add 15 to both sides:</u>

15 = 3u

<u>→Divide both sides by 3:</u>

5 = u

Anarel [89]3 years ago
7 0

Answer:

\boxed{u = 5}

Step-by-step explanation:

=  > 4u = 16u + 3( - 3u - 5) \\  \\  =  > 4u = 16u + (3 \times ( - 3u)) - (3 \times 5) \\  \\  =  > 4u = 16u - 9u - 15 \\  \\  =  > 4u = 7u  - 15 \\  \\  =  > 4u - 7u =  - 15 \\  \\  =  >  \cancel{- }3u =  \cancel{- }15 \\  \\  =  > 3u = 15 \\  \\  =  > u =  \frac{15}{3}  \\  \\  =  > u = 5

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