1.

Solve the simple equation and check the results : – 7m = 21

Answer»

Given – 7m = 21

⇒ -7m/-7 = 21/-7 (Divide by – 7 on both sides)

⇒ m = – 3

Check: 

Substitute m = in – 7m = 21 

LHS = – 7m 

= – 7 (- 3) 

= 21 = RHS 

Hence verified.



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