Write and solve an equation: Find a number such that 5 less than the opposite of the number is 3 times the sum of the number and -7

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Answer to a math question Write and solve an equation: Find a number such that 5 less than the opposite of the number is 3 times the sum of the number and -7

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Fred

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118 Answers

1. Write the equation:

-x - 5 = 3(x - 7)

2. Expand the right side:

-x - 5 = 3x - 21

3. Add

to both sides:

-5 = 4x - 21

4. Add 21 to both sides:

16 = 4x

5. Divide by 4:

x = 4

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