how many machines will be needed to complete a task in 18 days, given that it takes 12 days for 6 machines to complete the same
1 answer:
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we have
Step
Move the constants to the right side
Step
Factor 3 out of the variable terms
Step
Add to both sides of the equation
Step
Write the polynomial as a binomial squared
therefore
the answer is
Factor 3 out of the variable terms.
Answer: 1
Step-by-step explanation:
First you need to multiply 3 x 3 (9), because that's all 3 squared means.
Now the equation should be 9x-6x+3=0
Next we need to combine like terms. Do 9x - 6x which should give you 3x
Now your equations should be 3x+3=0
Now for the somewhat harder part...
Under the three (the one without the x) write -3 and under the zero write the same thing. the +3-3 cancels out so just put a line or something across it.
0-3= -3
so now you should have...
3x=-3 ignore the 3x, at this point it's useless in getting the answer because it would cancel out.
-3 divided by -3 is 1 because a negative (-) divided by a negative (-) equals a positive (+).
The answer should be x = 1
