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Marianna [84]
3 years ago
6

Becky and tommy are asked to solve -4x-25=8x+15 identity where one of them made an error

Mathematics
2 answers:
xxMikexx [17]3 years ago
4 0

Procedure to solve the equation in one variable

-4 x-25= 8 x+15

Taking variable on one side and constant on another side of equation

- 4 x - 8 x = 15 + 25(When one quantity goes on other side of equation , the sign preceding it changes)

- 12 x= 40

x = \frac{40}{-12}=\frac{-10}{3}

By looking at the solution described above , you can find yourself who has done the mistake between Becky and Tommy and  can also identify the error and rectify it.

ololo11 [35]3 years ago
3 0
I feel sorry for Becky and Tommy. The one who didn't come up with x=-10/3 made an error.

first bring 8x to the left and -25 to the right and simplify:

-4x-8x = 25+15 => -12x = 40

x = -40/12 = -10/3
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