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8090 [49]
3 years ago
8

Ernesto tried to determine the solution for the system of equations using substitution. His work is shown below.

Mathematics
2 answers:
AysviL [449]3 years ago
7 0
Step 3. he forgot to multiply 3 and 7.
storchak [24]3 years ago
3 0
Step 3 he forgot to multiply 3 by 7

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