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Verdich [7]
2 years ago
8

What are other equations for (12-4) x7 =x

Mathematics
1 answer:
Gennadij [26K]2 years ago
8 0

Answer:

The answer is 21

Step-by-step explanation:

<u> </u><u>(12-4)</u> x7 =x  Do everything in the parentheses

3x7 =x Then multiply 3 times 7 and  your answer should be 21.

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Sin (3x+19)=Cos(5x-25) <br> What is the value of x? <br> A) 6 <br> B) 12 <br> C) 18 <br> D) 24
malfutka [58]

Answer:

B

Step-by-step explanation:

Using the cofunction identity

sin x = cos(90 - x)

Given

sin(3x + 19) = cos(5x - 25), then

3x + 19 = 90 - (5x - 25)

3x + 19 = 90 - 5x + 25

3x + 19 = 115 - 5x ( add 5x to both sides )

8x + 19 = 115 ( subtract 19 from both sides )

8x = 96 ( divide both sides by 8 )

x = 12 → B

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20

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