document.write( "Question 116447: I have no clue how to do this problem can someone please help?\r
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document.write( "Solve the equations by graphing: y=5x-7
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document.write( " y-5x=8 \n" );
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Algebra.Com's Answer #84660 by checkley71(8403)![]() ![]() ![]() You can put this solution on YOUR website! Y=5X-7 (RED LINE) \n" ); document.write( "THIS LINE HAS A SLOPE OF 5 & A Y INTERCEPT OF (0,-7) \n" ); document.write( "TO FIND ANOTHER POINT SET Y=0 & SOLVE FOR X \n" ); document.write( "0=5X-7 \n" ); document.write( "5X=7 \n" ); document.write( "X=7/5 WHICH IS THE X INTERCEPT (7/5,0) \n" ); document.write( "---------------------------------------------- \n" ); document.write( "Y-5X=8 (GREEN LINE) \n" ); document.write( "Y=5X+8 HERE WE ALSO HAVE A SLOPE OF 5 WITH A Y INTERCEPT OF(0,8) \n" ); document.write( "TO FIND ANOTHER POINT. SET Y=O & SOLVE FOR X \n" ); document.write( "0=5X+8 \n" ); document.write( "5X=-8 \n" ); document.write( "X=-8/5 WHICH IS THE Y INTERCEPT (-8/5,0) \n" ); document.write( " \n" ); document.write( "---------------------------------------------------------------- \n" ); document.write( "so I'm just wondering if the answer would be 1.5, 0.5 or 0.5, 1.5 \n" ); document.write( "I think it's 1.5, 0.5 could you tell me if I'm correct? \n" ); document.write( "----------------------------------------------------------------- \n" ); document.write( "THERE IS NO SOLUTION TO THESE 2 LINES VIA GRAPHING BECAUSE THEY DO NOT INTERSECT. \n" ); document.write( "THERE IS ALSO NO ALGEBRAIC SOLUTION: \n" ); document.write( "Y=5X-7 USING (5X-7) FOR Y IN THE OTHER EQUATION PROVES THIS POINT: \n" ); document.write( "(5X-7)-5X=8 \n" ); document.write( "5X-5X=8+7 \n" ); document.write( "0=15 IS NOT A SOLUTION. \n" ); document.write( " \n" ); document.write( " |