document.write( "Question 1003099: Theere are 156 blocks to make a wall. The bottom 3 rows will all have the same number of blocks. The next 6 rows will each have 2 fewer than the row before it. How many blocks are in each row? I know its 22 for the bottom 3 and I know the rest just not the way to write equation \n" ); document.write( "

Algebra.Com's Answer #619899 by addingup(3677) $\"\"$ $\"About$

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Let's call the number of blocks in each of the first three rows x. Then we have:
\n" ); document.write( "3x, since the first three rows each have x blocks.
\n" ); document.write( "After that, the rows will have x-2 followed by x-2-2= x-4 and so on, like this:
\n" ); document.write( "3x+x-2+x-4+x-6+x-8+x-10+x-12=156
\n" ); document.write( "9x-42=156
\n" ); document.write( "9x=156+42
\n" ); document.write( "9x=198
\n" ); document.write( "x=198/9
\n" ); document.write( "x=22 is the number of blocks in the first 3 rows.
\n" ); document.write( "then you'll have:
\n" ); document.write( "20,18,16,14,12 & 10 in each successive row.
\n" ); document.write( "proof
\n" ); document.write( "3*22+20+18+16+14+12+10=156
\n" ); document.write( "66+90=156
\n" ); document.write( "156=156 We have the correct answer. \n" ); document.write( "

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