Asap! will upvote!
i think it's step one, but i'm not sure.
the work of a...
Mathematics, 03.02.2020 22:03 yola32
Asap! will upvote!
i think it's step one, but i'm not sure.
the work of a student to solve a set of equations is shown:
equation a: y = 15 โ 2z
equation b: 2y = 3 โ 4z
step 1: โ2(y) = โ2(15 โ 2z) [equation a is multiplied by โ2.]
2y = 3 โ 4z [equation b]
step 2: โ2y = 15 โ 2z [equation a in step 1 is simplified.]
2y = 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?
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