(08.05)
the work of a student to solve a set of equations is shown below:
equati...
Mathematics, 28.01.2020 14:43 emj70
(08.05)
the work of a student to solve a set of equations is shown below:
equation 1: m = 6 + n
equation 2: 2m = 8 + 8n
step 1:
−2(m) =
−2(6 + n)
2m =
8 + 8n
step 2:
−2m =
−12 − 2n
2m =
8 + 8n
step 3:
−12 − 2n =
8 + 8n
step 4:
−20 =
10n
step 5:
n =
−2
in which step did the student first make an error?
step 2
step 3
step 4
step 5
Answers: 1
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