Question

Breann solved the system of equations below. What mistake did she make in her work?

2x + y = 5
x − 2y = 10

y = 5 − 2x
x − 2(5 − 2x) = 10
x − 10 + 4x = 10
5x − 10 = 10
5x = 20
x = 4

2(4) + y = 5
y = −3

She should have substituted 5 + 2x

She combined like terms incorrectly, it should have been 4x instead of 5x

She subtracted 10 from both sides instead of adding 10 to both sides

She made no mistake

Answer 1

I am pretty sure she made no mistake, lol! :D

Answer 2

Does anyone know?

Answer 3

... weird

Answer 4

i dont see any mistakes

Answer 5

she showed no working, maybe?

Answer 6

Me either, Idon't know if that is the answer though. :)

Answer 7

id just go with "d"

Answer 8

This is the multiple choice, lol!...

She should have substituted 5 + 2x

She combined like terms incorrectly, it should have been 4x instead of 5x

She subtracted 10 from both sides instead of adding 10 to both sides

She made no mistake

Answer 9

wait she did... this is more confusing than ODE

Answer 10

Me too, but I want to make sure it is right though. :)

Answer 11

OHHHHHH she made no mistake then

Answer 12

...

you can always check your answers, by substituting both x and y into the 2 given equations

if the equations are both true, then there is no mistakes in teh work

Answer 13

Ok,t hx lol! I will. :)