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

Answer 1

i don't see any mistake
the answer is correct

Answer 2

you can check that x = 4, y =-3 works in both equations
\[ 2x+y=5\]
\[2\times 4+(3)=5\]
\[8-3=5\] true

\[x-2y=10\]
\[4-2(-3)=10\]
\[4+6=10\] true

Answer 3

thankyou , what about
Systems of equations with the same slopes and different y-intercepts have no solution.

Answer 4

another idiot math teacher question

Answer 5

yes

Answer 6

answers : always , never , or sometimes ?

Answer 7

same slope an different y intercepts means lines are parallel

Answer 8

Systems of equations with the same slopes and different y-intercepts have no solution.

always
jesus who makes up these questions????

Answer 9

haha i know rihgttt