document.write( "Question 387118: A=4b
\n" );
document.write( "A-b=9 \n" );
document.write( "
Algebra.Com's Answer #273643 by tara0066(31)![]() ![]() You can put this solution on YOUR website! A=(4B) (A)-B=9\r \n" ); document.write( "\n" ); document.write( "On this one substitution is the best way to go. You can plug in 4B from the first one into the second one, replacing the A.\r \n" ); document.write( "\n" ); document.write( "(4B)-B=9 Simplify \n" ); document.write( "3B=9 Divide by 3 \n" ); document.write( "B=3\r \n" ); document.write( "\n" ); document.write( "Next, plug that value for B into one of the original equations to solve for A.\r \n" ); document.write( "\n" ); document.write( "A=4(B) \n" ); document.write( "A=4(3) \n" ); document.write( "A=12\r \n" ); document.write( "\n" ); document.write( "Your answer is (12,3)\r \n" ); document.write( "\n" ); document.write( "This is the point that these two lines will cross. \n" ); document.write( " |