Question

If – 30 + (- y) + 20 = 0, then the value of y is?

Answer 1

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-30 - y + 20 = 0

➪ -30 + 20 = y

➪ - 10 = y

➪ y = -10

so, value of y is -10

Answer 2

Question

If – 30 + (- y) + 20 = 0, then the value of y is?

Answer

– 30 + (- y) + 20 = 0

=> - 30 + 20 (-y) = 0

=> -10 (-y) = 0

=> -y = 10

=> y = -10

Therefore, the value of y is - 10

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For solving such questions, the following must be kept in mind.BODMAS where,

B ( bracket)

O (off)

D (Division)

M (multiplication )

A (Addition)

S ( subtraction)

Tips to know :)

★When (-) is carried from one side to other ie. from LHS to RHS or vice versa , it changes into (+)

★When (+) is carried from one side to other ie. from LHS to RHS or vice versa , it changes into (-)

★When (×) is carried from one side to other ie. from LHS to RHS or vice versa , it changes into (÷)

★When (×) is carried from one side to other ie. from LHS to RHS or vice versa , it changes into (÷)