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Mathematics, 14.07.2019 14:00 isabhb4227
The work of a student to solve a set of equations is shown: equation a: y = 15 โ 2z equation b: 3y = 3 โ 4z step 1: โ3(y) = โ3(15 โ 2z) [equation a is multiplied by โ3.] 3y = 3 โ 4z [equation b] step 2: โ3y = 15 โ 2z [equation a in step 1 is simplified.] 3y = 3 โ 4z [equation b] step 3: 0 = 18 โ 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 4 step 3 step 2 step 1
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The work of a student to solve a set of equations is shown: equation a: y = 15 โ 2z equation b: 3...
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