OpenStudy (anonymous):

Carlos solved the system of equations below. What mistake did he make in his work? 2x + y = 5 x − 2y = 10 y = 5 − 2x x − 2(5 − 2x) = 10 x + 10 + 4x = 10 5x + 10 = 10 5x = 0 x = 0 2(0) + y = 5 y = 5 He should have substituted 5 + 2x He did not distribute correctly He combined like terms incorrectly, it should have been 4x instead of 5x He made no mistake

6 years ago
OpenStudy (eyust707):

ohh okay so this is similar to the last few weve done

6 years ago
OpenStudy (eyust707):

x − 2(5 − 2x) = 10

6 years ago
OpenStudy (anonymous):

did not distribute correctly, -2*5=-10

6 years ago
OpenStudy (eyust707):

take a look at this step

6 years ago
OpenStudy (eyust707):

awwe double drive gave away the answer =/

6 years ago
OpenStudy (eyust707):

do you see where it went wrong?

6 years ago
OpenStudy (anonymous):

yeah , it should have been -10

6 years ago
OpenStudy (eyust707):

yea exactly!

6 years ago