Question

Becky and Tommy are asked to solve −4x − 25 = 8x + 15. Identify where one of them made an error.
Becky made the error when she subtracted 8x

Becky made the error when she divided by 40

Tommy made the error when he added 4x

Tommy made the error when he added 15

Answer 1

Becky
−4x − 25 = 8x + 15
−4x − 25 − 8x = 8x + 15 − 8x
−12x − 25 = 15
-12x − 25 + 25 = 15 + 25
−12x = 40
Negative 12x over 40 equals 40 over 40
x=negative three-tenths

Answer 2

tommy
−4x − 25 = 8x + 15
−4x − 25 + 4x = 8x + 15 + 4x
−25 = 12x + 15
−25 − 15 = 12x + 15 − 15
−40 = 12x
negative 40 over 12 equals 12x over 12
x=negative ten-thirds

Answer 3

please help @princeharryyy

Answer 4

checking ur solution ... @kimberlylopez

Answer 5

why do u think tommy did it

Answer 6

@kimberlylopez

Answer 7

u there @kimberlylopez

Answer 8

yeahh ive got the answer thanks anyway

Answer 9

whats ur answer @kimberlylopez

Answer 10

Becky made the error when she divided by 40

Answer 11

how ????

Answer 12

because your trying to get anyway for the x ?.

Answer 13

have they given this ...
Becky
−4x − 25 = 8x + 15
−4x − 25 − 8x = 8x + 15 − 8x
−12x − 25 = 15
-12x − 25 + 25 = 15 + 25
−12x = 40
Negative 12x over 40 equals 40 over 40
x=negative three-tenths

tommy
−4x − 25 = 8x + 15
−4x − 25 + 4x = 8x + 15 + 4x
−25 = 12x + 15
−25 − 15 = 12x + 15 − 15
−40 = 12x
negative 40 over 12 equals 12x over 12
x=negative ten-thirds

Answer 14

@kimberlylopez

Answer 15

u dere @kimberlylopez

Answer 16

???? be quick cos ur answer may be wrong i am suspecting it @kimberlylopez

Answer 17

now if you are given those equations as above the answer is gonna be tommy who did it rather then sweet becky @kimberlylopez

Answer 18

and the answer is gonna be D @kimberlylopez