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Mathematics 19 Online
OpenStudy (anonymous):

The figure below shows line AB parallel to line CD. Segment EF is parallel to segment GH. What is the value of x?

OpenStudy (anonymous):

OpenStudy (anonymous):

@.Sam. @ganeshie8

ganeshie8 (ganeshie8):

\(\angle GEF \) and \(\angle BGH\) are corresponding angles, so they're congruent. \(\angle GEF \cong \angle BGH\)

OpenStudy (anonymous):

okay to set up the problem would it be 2x-60=x+5

ganeshie8 (ganeshie8):

correct ! since \(\angle GEF\) and \(\angle EFC\) are alternate interior angles, they're congruent. \(\angle GEF \cong \angle EFC\) \(2x-60 = x+5\) solve x

OpenStudy (anonymous):

I think I did it wrong :c I got -27.5

OpenStudy (ivettef365):

Both angles are the same therefore x+5 = 2x-60 therefore, x=65

OpenStudy (anonymous):

how do you get that though? you just add the 5 to the 60

OpenStudy (ivettef365):

You combine like terms: the 2x - x = 60 + 5

ganeshie8 (ganeshie8):

you have \(2x-60 = x + 5\)

ganeshie8 (ganeshie8):

first step, subtract x from both sides

OpenStudy (ivettef365):

x + 5 = 2x - 60 -x -x ----------------- 5 = x - 60 +60 +60 ============= 65 = x

ganeshie8 (ganeshie8):

\(2x-60 = x + 5\) \(x-60 = 5\)

ganeshie8 (ganeshie8):

second step, add 60 to both sides

ganeshie8 (ganeshie8):

\(2x-60 = x + 5\) \(x-60 = 5\) \(x = 65\)

OpenStudy (anonymous):

oh!! I was doing it completely different, thanks guys :)

ganeshie8 (ganeshie8):

thats it, 2 step equation it is

OpenStudy (anonymous):

thanks @ivettef365 , and ganeshie !

ganeshie8 (ganeshie8):

np, yw :)

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