The following equation is incorrect. Which two signs should be interchanged to correct the equation?
18 + 12 ÷ 9 - 30 x 16 = 10
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5 - 12 + 15 ÷ 50 x 25 = 23
20 ÷ 14 + 5 x 20 - 2 = 56
If 18$2 = 10, 8$4 = 6 and 12$18 = 15, then find the value of 7$9 = ?
16 ÷ 6 + 35 x 9 - 15 = 31
16 ÷ 8 - 5 x 2 + 6 = 9
If 'W' means 'x', 'X' means '-', 'Y' means '+' and 'Z' means '/', then 28 Z 7 W 8 X 6 Y 4 = ?
5 + 8 ÷ 40 - 20 x 25 = 6