113.0973355292328, but still, could you not find it out on your computer's calculator?
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X - 4 = 9 add 4 to each side X = 13 check 13 - 4 = 9 9 = 9
x=4 y=5 9x+7y=?? Replace: 9(4)+7(5)= 71
x2 = 9, 3 x 9 = 27, 27 - 4 = 23
5. Just do 9 minus 4. 5 plus 4 equals 9
-4