document.write( "Question 54593: can you please help i forgot how to do this
\n" ); document.write( "Solve each equation by the subtraction method. Determine whether the equation are independent, dependant, or inconsistent.
\n" ); document.write( "28. x =y + 4
\n" ); document.write( "3y – 2y = 4
\n" ); document.write( "thank you in advance
\n" ); document.write( " \n" ); document.write( "
Algebra.Com's Answer #36845 by funmath(2933)\"\" \"About 
You can put this solution on YOUR website!
Here you go:
\n" ); document.write( "L1) x=y+4
\n" ); document.write( "L2) 3x-2y=4
\n" ); document.write( "---------------Since L1 is already solved for x, substitute that in for x in L2 and solve for y
\n" ); document.write( "3(y+4)-2y=4
\n" ); document.write( "3y+12-2y=4
\n" ); document.write( "(3-2)y+12=4
\n" ); document.write( "1y+12=4
\n" ); document.write( "y+12=4
\n" ); document.write( "y+12-12=4-12
\n" ); document.write( "y=-8
\n" ); document.write( "---------------Substitute -8 into L1 for y and find out what x is:
\n" ); document.write( "x=(-8)+4
\n" ); document.write( "x=-8+4
\n" ); document.write( "x=-4
\n" ); document.write( "The solution is: (x,y)=(-4,-8)
\n" ); document.write( ":
\n" ); document.write( "Check by substituting this solution into both equations and see if they equal out.
\n" ); document.write( "L1) -4=-8+4
\n" ); document.write( "-4=-4 L1 Checks out.
\n" ); document.write( ":
\n" ); document.write( "L2) 3(-4)-2(-8)=4
\n" ); document.write( "-12+16=4
\n" ); document.write( "4=4 L2 Checks out also.
\n" ); document.write( ":
\n" ); document.write( "Now we can be sure that we were right, the solution really is, (-4,-8)
\n" ); document.write( "Happy Calculating!!! \n" ); document.write( "
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