document.write( "Question 100799: i need to know how to do this 7(r + 3) + 2(r - 2) thank you \n" ); document.write( "
Algebra.Com's Answer #74501 by JP(22)\"\" \"About 
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7(r + 3) + 2(r - 2)
\n" ); document.write( "First you must distribute or multiply the 7...7(r+3) to get 7r+21. 7*r=7r,7*3=21 read: 7 times r and 7 times 3.
\n" ); document.write( "Second you distribute the 2....2(r-2) to get 2r-4. 2*r=2r, 2*-2=-4
\n" ); document.write( "So at this point you have 7r+21+2r-4.
\n" ); document.write( "You must now add and subtract like-terms.
\n" ); document.write( "The like terms in the problem right now are, 7r,2r and 21,-4.
\n" ); document.write( "So add 7r+2r=9r and 21-4=17.
\n" ); document.write( "The final solution should be...
\n" ); document.write( "9r+17\r
\n" ); document.write( "\n" ); document.write( "Hope this helps.
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