document.write( "Question 1209779: The sum of quarter of what Elijah's age was 4 yrs ago and double of what it will be in 2 yrs is 66.\r
\n" );
document.write( "\n" );
document.write( "How old is Eliyah? \n" );
document.write( "
Algebra.Com's Answer #850383 by CPhill(1959)![]() ![]() You can put this solution on YOUR website! Let's solve this problem step-by-step.\r \n" ); document.write( "\n" ); document.write( "**1. Define the Variable**\r \n" ); document.write( "\n" ); document.write( "Let E be Elijah's current age.\r \n" ); document.write( "\n" ); document.write( "**2. Translate the Word Problem into an Equation**\r \n" ); document.write( "\n" ); document.write( "* \"4 years ago\": Elijah's age was E - 4 \n" ); document.write( "* \"Quarter of what Elijah's age was 4 years ago\": (1/4)(E - 4) \n" ); document.write( "* \"2 years from now\": Elijah's age will be E + 2 \n" ); document.write( "* \"Double of what it will be in 2 years\": 2(E + 2) \n" ); document.write( "* \"The sum of quarter of what Elijah's age was 4 years ago and double of what it will be in 2 years is 66\": (1/4)(E - 4) + 2(E + 2) = 66\r \n" ); document.write( "\n" ); document.write( "**3. Solve the Equation**\r \n" ); document.write( "\n" ); document.write( "* (1/4)(E - 4) + 2(E + 2) = 66 \n" ); document.write( "* (E - 4)/4 + 2E + 4 = 66 \n" ); document.write( "* Multiply the entire equation by 4 to eliminate the fraction: \n" ); document.write( " * E - 4 + 8E + 16 = 264 \n" ); document.write( "* Combine like terms: \n" ); document.write( " * 9E + 12 = 264 \n" ); document.write( "* Subtract 12 from both sides: \n" ); document.write( " * 9E = 252 \n" ); document.write( "* Divide both sides by 9: \n" ); document.write( " * E = 28\r \n" ); document.write( "\n" ); document.write( "**4. Check the Answer**\r \n" ); document.write( "\n" ); document.write( "* 4 years ago, Elijah was 28 - 4 = 24. A quarter of that is 24/4 = 6. \n" ); document.write( "* In 2 years, Elijah will be 28 + 2 = 30. Double that is 30 * 2 = 60. \n" ); document.write( "* 6 + 60 = 66. The answer checks.\r \n" ); document.write( "\n" ); document.write( "**Therefore, Elijah is 28 years old.** \n" ); document.write( " \n" ); document.write( " |