If you times 24 by 48 then you get 1,152. 3 times 24 is 72. You would then subtract 1,152 by 72 which equals 1,080 postcards left is what the shop has to sell.
If X = 23, the. 23 - 6 = 17.
3x<18 I'm not sure what the rule for this problem is.
X equals 4 and the x axis