The work of a student to solve a set of equations is shown:
equation 1: m = 8 + 2n
e...
Mathematics, 16.09.2019 11:30, jojojojo5730
The work of a student to solve a set of equations is shown:
equation 1: m = 8 + 2n
equation 2: 4m = 4 + 4n
step 1: โ4(m) = โ4(8 + 2n) [equation 1 is multiplied by โ4.]
4m = 4 + 4n [equation 2]
step 2: โ4m = โ32 โ 8n [equation 1 in step 1 is simplified.]
4m = 4 + 4n [equation 2]
step 3: โ4m + 4m = โ32 โ 8n + 4n [equations in step 2 are added.]
step 4: 0 = โ32 โ 4n
step 5: n = โ8
in which step did the student first make an error?
step 1
step 2
step 3
step 4
Answers: 1
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