document.write( "Question 1010548: 2x + 5y = -1\r
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document.write( " x + 2y = 0\r
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document.write( " can u please show me how to solve this problem step by step \n" );
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Algebra.Com's Answer #626011 by addingup(3677)![]() ![]() You can put this solution on YOUR website! 2x + 5y = -1 \n" ); document.write( "x + 2y = 0 On this equation, multiply both sides times 2: \n" ); document.write( "----------------------------------------------------------- \n" ); document.write( "2x+4y= 0 Now subtract this from the first equation \n" ); document.write( "------------------------------------------------------ \n" ); document.write( "2x + 5y = -1 \n" ); document.write( "- \n" ); document.write( "2x + 4y = 0 \n" ); document.write( "---------- \n" ); document.write( "... y = -1 Now that we know y we can find the value of x. For this we can use either one of the equations, let's use the second: \n" ); document.write( "----------------------------------------------------------- \n" ); document.write( "x + 2y = 0 \n" ); document.write( "x + 2(-1)= 0 \n" ); document.write( "x + -2= 0 \n" ); document.write( "x= 2 \n" ); document.write( "---------------------------------------------------------------- \n" ); document.write( "Check: \n" ); document.write( "2(2) + 5(-1) = -1 \n" ); document.write( "4 + -5 = -1 \n" ); document.write( "-1 = -1 This equation checks out \n" ); document.write( "---------------------------------------------------------------- \n" ); document.write( "x+2y = 0 \n" ); document.write( "2 + 2(-1) \n" ); document.write( "2 + -2 = 0 \n" ); document.write( "0 = 0 This equation also checks out. We have the correct answers \n" ); document.write( "J \n" ); document.write( " |