document.write( "Question 1065121: One number is 3 more than twice the other number. If the sum of the two numbers is 21, find the two numbers. \n" ); document.write( "
Algebra.Com's Answer #680278 by JulietG(1812)![]() ![]() You can put this solution on YOUR website! Let A be the first number and B be the second. \n" ); document.write( "What do we know from the problem? \n" ); document.write( "A + B = 21 \n" ); document.write( "A = 2B + 3 \n" ); document.write( "Substitute the value of A from the second equation into the first. \n" ); document.write( "A + B = 21 \n" ); document.write( "(2B+3) + B = 21 \n" ); document.write( "3B + 3 = 21 \n" ); document.write( "3B = 18 \n" ); document.write( "Divide \n" ); document.write( "B = 6 \n" ); document.write( "If B is 6, then A is \"3 more than twice\" this. 3+2(6) = 3+12 = 15 \n" ); document.write( "To check the answer, put the values back into the original equation. \n" ); document.write( "Does 15 + 6 = 21? Yes \n" ); document.write( "Success! \n" ); document.write( " |