document.write( "Question 803753: Hi I'm struggling with my maths equations. First question is:
\n" ); document.write( "Answer these equations by using the substitution method.
\n" ); document.write( "y=4x-7
\n" ); document.write( "3x+2y=30
\n" ); document.write( "Would really appreciate any help. \n" ); document.write( "
Algebra.Com's Answer #484480 by Edwin McCravy(20055)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "y=4x-7\r\n" );
document.write( " 3x+2y=30\r\n" );
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document.write( "Take the second equation:\r\n" );
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document.write( " 3x+2y=30\r\n" );
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document.write( "Replace the letter \"y\" by the right side of the first equation which is\r\n" );
document.write( "4x-7 placed within parentheses like this: (4x-7)\r\n" );
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document.write( " 3x+2(4x-7)=30\r\n" );
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document.write( "Now use the distributive principle\r\n" );
document.write( "to remove the parentheses.\r\n" );
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document.write( " 3x+8x-14=30\r\n" );
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document.write( "Combine the like terms 3x and 8x\r\n" );
document.write( "and get 11x\r\n" );
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document.write( "   11x-14=30\r\n" );
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document.write( "Add 14 to both sides\r\n" );
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document.write( "      11x=44\r\n" );
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document.write( "Divide both sides by 11\r\n" );
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document.write( "        x=4\r\n" );
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document.write( "That's the answer for x,\r\n" );
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document.write( "But you also need the value for y.\r\n" );
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document.write( "So take the first equation\r\n" );
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document.write( "y=4x-7\r\n" );
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document.write( "And replace x by (4)\r\n" );
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document.write( "y=4(4)-7\r\n" );
document.write( "y=16-7\r\n" );
document.write( "y=9\r\n" );
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document.write( "So the solution is: x=4 and y=9\r\n" );
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document.write( "Edwin
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