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SAI International School

Grade-VII

Mathematics

CHAPTER-4: Simple Equations,

LESSON NOTE-3

SUBTOPICS: More Equations, from Solution to equation

More Equations:

Solve the following equations.

i) 5t + 28 = 10

Solution:- By transposing 28 from LHS to RHS it becomes -28

Then,

= 5t = 10 – 28

= 5t = – 18

Now, Divide both side by 5,

= 5t/5= -18/5

= t = -18/5

ii) 4 = 5(p – 2)

Solution: - Let us divide both the side by 5,

= 4/5 = (5(p – 2))/5

= 4/5 = p -2

By transposing – 2 from RHS to LHS it becomes 2

= (4/5) + 2 = p

= (4 + 10)/ 5 = p