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sukhopar [10]
3 years ago
13

Three times the difference of a number and 9 is -3. Find the number

Mathematics
1 answer:
Drupady [299]3 years ago
4 0
3(n-9)=-3
3n-27=-3
3n=-30
n=-10
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Which expression is equivalent to (3x-1) (-5x+6)?
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Answer:

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Step-by-step explanation:

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For this question, we can assume that RS + ST = RT.  So now, we just have to plug in the expressions for these lengths, and solve the equation.

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Because we are only dealing with one operation, the parentheses aren't necessary.

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Next, we should combine like terms on the left side of the equation. We know that 3x + 2x = 5x, and that 1 - 2 = -1.

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The goal of an equation is to get the variable alone.  To do this, we have to get rid of the -1 on the left side of the equation.  So, we are going to add 1 to both sides of the equation, to cancel out the -1 on the left side.

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