document.write( "Question 98: In 7 years, Maria will be four times as old as Angelica will be then. The sum of their ages now is 71. How old will each of them be in 5 years? \n" ); document.write( "
Algebra.Com's Answer #49 by ichudov(507)![]() ![]() You can put this solution on YOUR website! All you have to do is express it as equations:\r \n" ); document.write( "\n" ); document.write( "Maria + 7 = 4*(Angelica +7) \n" ); document.write( "Maria + Angelica = 71\r \n" ); document.write( "\n" ); document.write( "Replace Maria with M and Angelica with A\r \n" ); document.write( "\n" ); document.write( "M=4*A = -7-4*7 \n" ); document.write( "M+A = 71\r \n" ); document.write( "\n" ); document.write( "This is a classic linear system of equations, for which I have a solver that shows work. \n" ); document.write( " |