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NCERT Class 7 Mathematics Solutions: Chapter 4 – Simple Equations Exercise 4.1 Part 3
1. Solve the following equations by trial and error method:
(i)
(ii)
Answer:
(i)
Putting in L. H. S
Putting in L. H. S
Putting in L. H. S
Hence, is a solution of the given equation.
(ii)
Putting
Putting
Putting
Putting
Putting
Putting
Hence, is a solution of the given equation.
2. Write equations for the following statements:
(i) The sum of numbers and .
(ii) 2 subtracted from .
(iii) Ten times is .
(iv) The number divided by .
(v) Three-fourth of is .
(vi) Seven times plus gets you .
(vii) One-fourth of a number minus gives .
(viii) If you take away from times you get .
(ix) If you add to one-third of you get .
Answer:
(i)
(ii)
(iii)
(iv)
(v)
(vi) Seven times of
(vii) One-fourth of a number
(viii) Six times of
(ix) One-third of