Terry solved the system of equations below. What mistake did he make in his work?
3x + y = 6
x − 2y = 2

y = 6 − 3x
x − 2(6 − 3x) = 2
x − 12 − 6x = 2
−5x − 12 = 2
+12 +12

x = −2.8

3(−2.8) + y = 6
−8.4 + y = 6
+8.4 +8.4
y = 14.4

A. He should have substituted 6 + 3x.

B.He combined like terms incorrectly. It should have been 5x instead of −5x.

C.He made a mistake in distributing −2.

D.He made no mistake.

Question

Terry solved the system of equations below. What mistake did he make in his work?
3x + y = 6
x − 2y = 2

y = 6 − 3x
x − 2(6 − 3x) = 2
x − 12 − 6x = 2
−5x − 12 = 2
       +12 +12

x = −2.8

3(−2.8) + y = 6
 −8.4 + y = 6
+8.4         +8.4
            y = 14.4

A. He should have substituted 6 + 3x.

B.He combined like terms incorrectly. It should have been 5x instead of −5x.

C.He made a mistake in distributing −2.

D.He made no mistake.

anonymous · Answer

Help Please :)

anonymous · Answer

-2 times -3x is positive 6 mind the brackets

anonymous · Answer

so he made a mistake in distributing -2..?

anonymous · Answer

He made a mistake on the fourth line when he opened the brackets

anonymous · Answer

sooo..? lol

anonymous · Answer

-2 times -3 =6   not -6 as he did

anonymous · Answer

ohh soo the answer is C..! :)

anonymous · Answer

oh ok its a multiple choice question I didnt notice yes the answer is C

anonymous · Answer

lol ok thank you :)

anonymous · Answer

Welcome