Subject :IMO Class : Class 7
If the digits '5' and '8', signs '+' and '×' are interchanged on the left hand side in each option, then which of the following becomes correct?
A5 + 8 × 2 = 22
B8 + 5 × 2 = 18
C5 × 8 + 2 = 42
D8 × 2 + 5 = 21