document.write( "Question 1136642: the slope of a line is -2 and the line contains the points (7 4) and (x 12) what is the value of x
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Algebra.Com's Answer #754440 by ankor@dixie-net.com(22740) $\"\"$ $\"About$

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the slope of a line is -2 and the line contains the points (7 4) and (x 12) what is the value of x?
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\n" ); document.write( "We can use the slope equation: m = $\"%28%28y2-y1%29%29%2F%28%28x2-x1%29%29\"$
\n" ); document.write( "where:
\n" ); document.write( "x1 = 7; y1 = 4
\n" ); document.write( "x2 = x; y2 = 12
\n" ); document.write( "m = -2
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\n" ); document.write( "-2 = $\"%28%2812-4%29%29%2F%28%28x-7%29%29\"$
\n" ); document.write( "-2(x-7) = 8
\n" ); document.write( "-2x + 14 = 8
\n" ); document.write( "-2x = 8 - 14
\n" ); document.write( "-2x = -6
\n" ); document.write( "x = -6/-2
\n" ); document.write( "x = +3
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\n" ); document.write( "Check
\n" ); document.write( " $\"%28%2812-4%29%29%2F%28%283-7%29%29\"$ = $\"8%2F%28-4%29\"$ = -2 \n" ); document.write( "

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