Answered

Find the best solutions to your problems with the help of IDNLearn.com's expert users. Find the information you need quickly and easily with our comprehensive and accurate Q&A platform.

What was his mistake?

What Was His Mistake class=

Sagot :

Monospaceidn

Circle the first line.

His mistake was: He substituted y from 2nd equation in 1st equation incorrectly. There is a minus sign before y and it wasn't taken into the account.

The correct steps are:

2x - y = 18

2x - (4x + 2) = 18

2x - 4x - 2 = 18

-2x - 2 = 18

-2x = 20

x = -10

y = 4x + 2

y = 4(-10) + 2

y = -40 + 2

y = -38

Your presence in our community is highly appreciated. Keep sharing your insights and solutions. Together, we can build a rich and valuable knowledge resource for everyone. Thank you for choosing IDNLearn.com for your queries. We’re committed to providing accurate answers, so visit us again soon.