document.write( "Question 573803: Find a number such that twice the number increased by seven is the same as four times the number decreased by three. \n" ); document.write( "
Algebra.Com's Answer #368870 by mathsmiles(68)![]() ![]() You can put this solution on YOUR website! Let's let X be the number we're looking for.\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "The problem says if we take twice the number increased by 7 or ... \n" ); document.write( "2X + 7 \n" ); document.write( "it should equal four times the number decreased by 3 ... \n" ); document.write( "4X - 3\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Let's find it!\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "2X + 7 = 4X - 3 \n" ); document.write( "Subtract 2X from each side: \n" ); document.write( "7 = 2X - 3 \n" ); document.write( "Add 3 to each side: \n" ); document.write( "10 = 2X \n" ); document.write( "Divide both sides by 2 \n" ); document.write( "5 = X\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "Checking: \n" ); document.write( "2(5) + 7 = 4(5) - 3? \n" ); document.write( "10 + 7 = 20 - 3? \n" ); document.write( "17 = 17 Correct! \n" ); document.write( " |