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Grade 7 - Mathematics6.27 Solution of Simple Equations - VII

 Example: Solve the equation 3x + 4(x-1) = 2. Solution: If there are parenthesis in the equation they should be removed first. The equation can be written as: 3x + 4(x-1) = 2 3x + 4x - 4 = 2 7x - 4 = 2 7x = 2 + 4 7x = 6 x = 6/7 Verification: Substituting x = 6/7 in the equation L.H.S. Þ 3x + 4(x-1) Þ 3 * 6/7 + 4(6/7 - 1) = 18/7 + 4[(6-7)/7] = 18/7 + 4(-1)/7 18/7 - 4/7 = (18-4)/7 = 14/7 = 2 = R.H.S. \ x = 6/7 is the solution. Directions: Solve the following linear equations. Also write at least ten examples of your own.
 Q 1: Solve the equation 3x + 8(x-2) = 9.15/1116/525/1112/13 Q 2: Solve the equation 7x + 9(x-1) = 3.4/312/173/418/3 Q 3: Solve the equation 9x + 2(x-5) = 6.911/1616/115/16 Q 4: Solve the equation 2x + 6(x-4) = 9.46/515/733/833/9 Question 5: This question is available to subscribers only! Question 6: This question is available to subscribers only!

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