document.write( "Question 1061087: I have a final tomorrow and I need help. It says to use the substitution method on the equation y/2 -x=1 and the other equation (cause it's in systems of equations) is x+y+7=0. What do I do? \n" ); document.write( "
Algebra.Com's Answer #675908 by josgarithmetic(39620)![]() ![]() ![]() You can put this solution on YOUR website! Pick an equation and solve for one variable in terms of the other. Substitute this expression into the other equation and solve for the single variable. Now use this found variable's value to evaluate the other variable.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "You have two equations and two variables, so you have four ways to go. Try to pick the way that seems easiest.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( " \n" ); document.write( "Substitute this for x in the OTHER equation. Solve for the value of y.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Now do the other variable's evaluation. \n" ); document.write( " |