alfonsogranielcarril alfonsogranielcarril

25-08-2020
Mathematics

contestada

What common error(s) did this student make? What is the correct solution for x? Please help

What common errors did this student make What is the correct solution for x Please help class=

Respuesta :

jawayriyya jawayriyya

25-08-2020

Answer:

10x - 5(x - 1) = 20

10x - 5x + 5 = 20

5x + 5 = 20

5x = 20 - 5

5x = 15

x = 15/5

x = 3

Step-by-step explanation:

Answer Link

altavistard altavistard

25-08-2020

Answer:

x = 3

Step-by-step explanation:

The first error was in the 2nd line: -5(x - 1) is -5x + 5, not -5x - 5 = 20.

Continuing the solution:

10x - 5x + 5 = 20

Combining like terms, we get

5x = 15, and so x = 3

Answer Link

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