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Gelneren [198K]
3 years ago
12

Wrote and solve an equation to find the number.The difference of twice a number and 7 is 9​

Mathematics
1 answer:
andrew11 [14]3 years ago
6 0

n - 7 = 9

Step-by-step explanation:

so basically just make up a random variable and place it for the "twice a number" then u sovle it as a 2 step equation

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Answer:

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Step-by-step explanation:

-3x + 3y = 4

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<u>Solve the equation for x:</u>

<u>Move the variable to the right side and change its sign</u>

-x + y = 3

-x = 3 - y

<u>Change the signs on both sides of the equation</u>

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x = -3 + y

<u>Substitute the given value of x into the equation -3x + 3y = 4</u>

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<u>Solve the equation for y</u>

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y = 0

There is no solution for y.

And since there's no solution for y, the system has no solution.

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