CBSE Class 7 Mathematics Simple Equations Assignment Set 03

Questions from Complete chapter

Question. Solve for \(x\) : \( \frac{2x}{3} + 8 = \frac{x}{2} - 1 \)
Answer: \( x = -9 \)

Question. Solve for \(x\) : \( 16(3x - 5) - 10(4x - 8) = 40 \)
Answer: \( x = 5 \)

Question. Solve the equation by trial and error method \( 2x - 3 = 9 \)
Answer: \( x = 6 \)

Question. Verify by substitution that the root of \( 3x - 5 = 7 \) is \( x = 4 \)
Answer: Correct

Question. Write the statement for the following equation \( 2x - 3 = 15 \)
Answer: 3 is subtracted from twice a no., the result is 15

Question. Write the equation for the following statement "3 less from 4 times a number is 15"
Answer: \( 4x - 3 = 15 \)

Question. Solve for \(x\) and check the result. \( 3x + 5 = 13 - x \)
Answer: \( x = 2 \)

Question. Five times the price of a pen is Rs 17 more than three times its price. Find the price of the pen
Answer: Rs 8.50

Question. The number of boys in a school is 334 more than the number of girls. If the total strength of the school is 572, find the number of girls in the school.
Answer: No. of girls in school = 119

Question. Sunita is twice as old as her brother. In 6 years time, the sum of their ages will be 39. What are their ages now?
Answer: Sunita's Age = 18 yrs, Brother's Age = 9 yrs