[correct answer receives brainliest only
the work of a student to solve a set of equations is...
Mathematics, 27.01.2020 21:31, natajayd
[correct answer receives brainliest only
the work of a student to solve a set of equations is shown: equation a: y = 16 β 2z equation b: 7y = 2 β 4z
step 1: β7(y) = β7(16 β 2z) [equation a is multiplied by β7.]
7y = 2 β 4z [equation b]
step 2: β7y = 16 β 2z [equation a in step 1 is simplified.]
7y = 2 β 4z [equation b]
step 3: 0 = 18 β 6z [equations in step 2 are added.]
step 4: 6z = 18
step 5: z = 3
in which step did the student first make an error?
step 3
step 4
step 1
step 2
Answers: 3
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