X-12=13
+12 +12
x=25
25
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One 12'x12' square would equal 144sq ft.If you meant how many 12"x12" squares equal 144 sq ft then the answer is 144.' = feet " = inches
75.6=6.30 x 12.0 Work: 6.3 x12 126 +630 75.6
The idea is to replace "x" by its value, to replace "y" by its value, and then to do the calculations.
1 divided by 13 equals 13
no .of bricks = area of room /area of bricks area of room = 9 X12 X12 X12 inches ( 1 foot =12 inches ) area of bricks =3 X8 no.0f bricks =9 X12 X12 X12 inches /3 X 8 =648