document.write( "Question 275815: find value of x and y
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document.write( "1.) 2x+5y=-9
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document.write( " 3x-4y=-2\r
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document.write( "2.) 4x+13y=40
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document.write( " 4x+3y=-40\r
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document.write( "3.) 2x-3y=-15
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document.write( " y=x-2\r
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document.write( "4.)2x-3y=-15
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document.write( " x=4y\r
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document.write( "5.)x+y=14
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document.write( " x=6y\r
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document.write( "6.)y=x-2
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document.write( " 7y-4x=10\r
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document.write( "i would really like to know these answers to this equations please!!!
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document.write( "
Algebra.Com's Answer #201124 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! find value of x and y \n" ); document.write( "1.) \n" ); document.write( "2x+5y=-9 \n" ); document.write( "3x-4y=-2 \n" ); document.write( "--------------- \n" ); document.write( "Multiply 1st Eq by 3 ; Multiply 2nd Eq by 2 \n" ); document.write( "6x + 15y = - 27 \n" ); document.write( "6x - 8y = -4 \n" ); document.write( "---------------- \n" ); document.write( "Subtract 2nd from 1st and solve for \"y\": \n" ); document.write( "23y = -23 \n" ); document.write( "y = -1 \n" ); document.write( "--------------------- \n" ); document.write( "Substitute into original #1 and solve for \"x\": \n" ); document.write( "2x + 5(-1) = -9 \n" ); document.write( "2x = -4 \n" ); document.write( "x = -2 \n" ); document.write( "Ans: (-2,-1) \n" ); document.write( "====================== \n" ); document.write( " \n" ); document.write( "2.) \n" ); document.write( "4x+13y=40 \n" ); document.write( "4x+3y=-40 \n" ); document.write( "----------------------- \n" ); document.write( "Subtract 2nd from 1st: \n" ); document.write( "10y = 80 \n" ); document.write( "y = 8 \n" ); document.write( "---- \n" ); document.write( "Substitute into 4x+3y = -40 to solve for \"x\": \n" ); document.write( "4x + 3(8) = -40 \n" ); document.write( "4x + 24 = -40 \n" ); document.write( "4x = -64 \n" ); document.write( "x = -16 \n" ); document.write( "--- \n" ); document.write( "Ans: (-16,8) \n" ); document.write( "================================== \n" ); document.write( " \n" ); document.write( "3.) \n" ); document.write( "2x-3y=-15 \n" ); document.write( "y=x-2 \n" ); document.write( "--- \n" ); document.write( "Substitute for \"y\" and solve for \"x\": \n" ); document.write( "=========================================\r \n" ); document.write( "\n" ); document.write( " \n" ); document.write( "4.) \n" ); document.write( "2x-3y=-15 \n" ); document.write( "x=4y \n" ); document.write( "--- \n" ); document.write( "Substitute for \"x\" and solve for \"y\": \n" ); document.write( "========================================== \n" ); document.write( " I'll leave the rest to you. \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( "========================================== \n" ); document.write( "5.)x+y=14 \n" ); document.write( "x=6y \n" ); document.write( "6.)y=x-2 \n" ); document.write( "7y-4x=10 \n" ); document.write( " \n" ); document.write( " |