I already know the answer to this problem, I want a explanation on how to get the answer

asked Aug 16, 2022 154k views

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by Sacse

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$\\ \bull\tt\dashrightarrow 3x+7=4x-5$

$\\ \bull\tt\dashrightarrow 4x-3x=7+5$

$\\ \bull\tt\dashrightarrow x=12$

Now

$\\ \bull\tt\dashrightarrow m<BAD=3x+7=3(12)+7=36+7=43$

$\\ \bull\tt\dashrightarrow y+4=5y-4$

$\\ \bull\tt\dashrightarrow 5y-y=4+4$

$\\ \bull\tt\dashrightarrow 4y=8$

$\\ \bull\tt\dashrightarrow y=2$

Now

$\\ \bull\tt\dashrightarrow BC=y+4+5y-4$

$\\ \bull\tt\dashrightarrow BC=6y$

$\\ \bull\tt\dashrightarrow BC=6(2)=12$

Liltof answered Aug 22, 2022

4.0k points

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