Answer:
<h3>

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Option B is the correct option.
Step-by-step explanation:

Apply cross product property
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Distribute 5 through the parentheses
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Multiply the numbers
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Move 5 to right hand side and change it's sign
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Add the numbers
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Divide both sides of the equation by 5
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Hope I helped!
Best regards!!
It’s 6.3 cause you add the two number
Cross multiplication, 3(9+x) = 63
27+3x = 63
3x = 63-27 = 36
x=36/3=12
2x = 8 so x = 8/2 = 4
or
3x = 12
x = 12/3
x = 4
answer: x = 4 (answer is your last choice)