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### Grade 7 - Mathematics6.17 Solution of Simple Equations - I

 Example: Solve the equation x+6=8. Solution: The unknown quantity x is on the L.H.S. of the equation and 6 is added to it. To remove 6 from L.H.S., perform the inverse operation of addition i.e., subtraction. Hence subtracting 6 from both sides of the equation, we get x+6-6 = 8-6 x=2 Verification: Substituting x=2 in the equation, L.H.S.Þx+6 = 2+6 = 8 = R.H.S. \x=2 is the solution. Directions: Solve the following equations. Also write at least ten examples of your own and solve for the unknown variable.
 Q 1: x+9 = 13Answer: Q 2: x+9 = 20Answer: Q 3: x+15 = 15Answer: Q 4: 4+x = 10Answer: Q 5: x+20 = 30Answer: Q 6: x+6 = 9Answer: Q 7: x+19 = 20Answer: Q 8: 7+x = 15Answer: Question 9: This question is available to subscribers only! Question 10: This question is available to subscribers only!