(25-x)+33=21
25 – x + 33 = 21
– x = 21 – 33 – 25
-x = -37
x = 37
72-(x+33)-8=0
72 – x – 33 – 8 = 0
– x = 0 + 8 + 33 – 72
-x = -31
x = 31
(25-x)+33=21
25 – x + 33 = 21
– x = 21 – 33 – 25
-x = -37
x = 37
72-(x+33)-8=0
72 – x – 33 – 8 = 0
– x = 0 + 8 + 33 – 72
-x = -31
x = 31