document.write( "Question 246646: Solve each system by substitution. Determine whether the
\n" ); document.write( "equations are independent, dependent, or inconsistent, can someone please help me solve this equation\r
\n" ); document.write( "\n" ); document.write( "y= -4x-7
\n" ); document.write( "y= 3x \n" ); document.write( "
Algebra.Com's Answer #180082 by ankor@dixie-net.com(22740)\"\" \"About 
You can put this solution on YOUR website!
y= -4x - 7
\n" ); document.write( "Since y = 3x we can write the 1st equation:
\n" ); document.write( "3x = -4x - 7
\n" ); document.write( "add 4x to each side
\n" ); document.write( "3x + 4x = -7
\n" ); document.write( "7x = -7
\n" ); document.write( "Divide both sides by 7
\n" ); document.write( "x = \"%28-7%29%2F7\"
\n" ); document.write( "x = -1
\n" ); document.write( ":
\n" ); document.write( "Find y:
\n" ); document.write( "y = 3x
\n" ); document.write( "y = 3(-1)
\n" ); document.write( "y = -3
\n" ); document.write( ":
\n" ); document.write( "Check solution in 1st equation, substitute for x and y
\n" ); document.write( "y = -4x - 7
\n" ); document.write( "-3 = -4(-1) - 7
\n" ); document.write( "-3 = +4 - 7
\n" ); document.write( ":
\n" ); document.write( "x is the independent variable
\n" ); document.write( "y is the dependent variable \n" ); document.write( "
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