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
1 x 314 and 2 x 157
1 x 1256, 2 x 628, 4 x 314, 8 x 157 = 1,256
13
14 x 9 x 4 = 504 cubic units
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
4. 1 x 4 equals 4 - - 9 x 4 equals 36
x2 = 9, 3 x 9 = 27, 27 - 4 = 23
If: x+(-5) = 4 Then: x = 9
5. Just do 9 minus 4. 5 plus 4 equals 9
-4
9X=4 gives x=4/9