Mathematics, 28.06.2019 10:30 anaber524
The work of a student to solve a set of equations is shown: equation a: y = 4 β 2z equation b: 4y = 2 β 4z step 1: β4(y) = β4(4 β 2z) [equation a is multiplied by β4.] 4y = 2 β 4z [equation b] step 2: β4y = 4 β 2z [equation a in step 1 is simplified.] 4y = 2 β 4z [equation b] step 3: 0 = 6 β 6z [equations in step 2 are added.] step 4: 6z = 6 step 5: z = 1 in which step did the student first make an error? (5 points)
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The work of a student to solve a set of equations is shown: equation a: y = 4 β 2z equation b: 4y...
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