Question

pls answer the question in attachment.
if correct brainliest if wrong it will be reported.​

Answer 1

Answer:

3d-7

Step-by-step explanation:

Let the first number be x

Then, second number = x+2d+5

Third number = x+2d+5−(3d−20) = x−d+25

Sum of the three numbers = x+x+2d+5+x−d+25 = 3x+d+30

Thus, 3x+d+30 = 10d+9

3x=10d+9−d−30 = 9d−21

x=3d−7

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