Question

Kisha and Rae are asked to solve –5x – 14 = 2x + 7. Identify where one of them made an error.


Kisha
Rae
–5x – 14 = 2x + 7
–5x – 14 – 2x = 2x + 7 – 2x
–7x – 14 = 7
–7x – 14 + 14 = 7 + 14
–7x = 21
Negative 7x over negative 7 equals 21 over negative 7
x = – 3
–5x – 14 = 2x + 7
–5x – 14 + 5x = 2x + 7 + 5x
–14 = 7x + 7
–14 + 7 = 7x + 7 + 7
–7 = 7x

x = – 1
(1 point)


Rae made the error when she added 7
Rae made the error when she added 5x
Kisha made the error when she subtracted 2x
Kisha made the error when she divided by –7

Answer 1

wht do u think whose solution is correct??

Answer 2

B

Answer 3

u mean Rae made the error when she added 5x???? why so??? its totally fine u see.... bcoz of tht step x gets eliminated from a side of the equality

Answer 4

oh sorry

Answer 5

Rae added 7 on both sides which makes no sense all......though if she would hav subtracted 7 then it would make some sense

Answer 6

im still confused sorry

Answer 7

if she would hav subtracted 7 on both sides it would be
-14 - 7 = 7x + 7 - 7
-21 = 7x
x = -3

Answer 8

thanks so much

Answer 9

yw...:)) btw u undrstood?

Answer 10

can you help me with more questions i have?

Answer 11

i am afraid i can't...i gotta get ready for college.......