Mathematics, 20.11.2021 09:50 MarMoney
Ernesto tried to determine the solution for the system of equations using substitution. His work is shown below.
x – y = 7
3x – 2y = 8
Step 1: x = y + 7
Step 2: 3(y + 7) – 2y = 8
Step 3: 3y + 7 – 2y = 8
Step 4: y + 7 = 8
Step 5: y = 1
In which step did Ernesto make the first error?
Answers: 3
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Ernesto tried to determine the solution for the system of equations using substitution. His work is...
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