1.

Simplify the following i)6x - 3y + 9x + 2y - (-x + y)ii) (4x + 5y ) - (-3y + y)

Answer»

Answer :-

i] 6X - 3Y + 9X + 2y - (-x + y)

= 6x - 3y + 9x + 2y + x - y

= 16X - 3y + 2y - y

= 16x - 4y + 2y

= 16x - 2y

= 2(8x - y) Answer.

II] (4x + 5y ) - (-3y + y)

= 4x + 5y + 3y - y

= 4x + 8y - y

= 4x + 7y Answer.

Additional information :-

  • To simplify a equation, we've to plus/minus the terms that include the same variable. Like we can't add 4x & 2y. We can add 4x with 2x (4x + 2x = 6x) or, 3y with 6y (3y + 6y = 9y)
  • Minus into minus becomes a plus. (- × - = +)
  • Plus into plus remains a plus. (+ × + = +)
  • Plus into minus becomes a minus. (+ × - = -)
  • For eg., 5x × (-7) = -35x [Since, 5x has a plus sign and 7 has a minus sign.]



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