document.write( "Question 1015340: Hey there, I have been given a simultaneous equations hwk, and have been doing fine up till now, where I cannot get passed. Here follows 2 examples of the questions that I am struggling with: $\"3y-x=15\"$ and $\"2x%2By=-2\"$ is the first set, the 2nd is $\"4y-2x=22\"$ and $\"3x%2B2y=7\"$ . I know that I must rearange one equation and then solve through substitution here's what I get, $\"3y=15-x\"$ this I need to sub in, but the other equation only has 1y not 3y, so I do not know how to get rid of this 3y to make it equal 1! Thanks for reading! \n" ); document.write( "

Algebra.Com's Answer #631701 by ikleyn(52781) $\"\"$ $\"About$

You can put this solution on YOUR website!
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\n" ); document.write( "Hey there, I have been given a simultaneous equations hwk, and have been doing fine up till now, where I cannot get passed. Here follows 2 examples of the questions that I am struggling with: $\"3y-x=15\"$ and $\"2x%2By=-2\"$ is the first set, the 2nd is $\"4y-2x=22\"$ and $\"3x%2B2y=7\"$ . I know that I must rearange one equation and then solve through substitution here's what I get, $\"3y=15-x\"$ this I need to sub in, but the other equation only has 1y not 3y, so I do not know how to get rid of this 3y to make it equal 1! Thanks for reading!
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document.write( "1.\r\n" );
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document.write( "3y - x = 15    (1)\r\n" );
document.write( "2x + y = -2    (2)\r\n" );
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document.write( "Express x from (1): x = 3y - 15, and substitute it into (2).\r\n" );
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document.write( "Please complete it yourself.\r\n" );
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document.write( "-------------------------------------------\r\n" );
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document.write( "2.\r\n" );
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document.write( "4y - 2x = 22    (1)\r\n" );
document.write( "3x + 2y =  7    (2)\r\n" );
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document.write( "Express 2y via x from (2): 2y = 7 - 3x, and substitute it into (1).\r\n" );
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document.write( "Please complete it yourself.\r\n" );
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