Leadership

Mathematics

Eight Standard

Test your understanding of this lesson Conversion of a mathematical statement to a linear equation:-

1)
The sum of a number and 8 is 25,its corresponding equation is
  • x=25+8
  • x+25=8
  • x+8 =25
  • 8x=25
2)
Three times of a number added to 12 gives -7...it's equation is when the number be x
  • 3x+12=-7
  • 3(x+12)=-7
  • x+3x12=-7
  • 3x-7=12
3)
15 is subtracted from twice of a number yields 25,considering the unknown number as x,we get an equation as
  • 15x-2=25
  • 15-2x=25
  • 2x-15=25
  • 2x-25=15
4)
When \(\frac{2}{3}\) is added to a number and the sum is divided by\(\frac{1}{3}\) we get 8 as a result,the equation is
  • \(\frac{1}{3}(\frac{2}{3}+x)=8\)
  • \(3(\frac{1}{3}+x)=8\)
  • \(\frac{1}{3}\div(\frac{2}{3}+x)=8\)
  • \(\frac{1}{3}(x-\frac{2}{3})=8\)
5)
Two-thirds of 9 subtracted from a number is equal to one-fourth of the sum of the number and 6.If the unknown number be x then it's equation is
  • x-2/3\(\frac{2}{3}\) of 9=\(\frac{1}{4}\)(x+6)
  • \(\frac{2}{3}\) of 9-x=\(\frac{1}{4}\)(x+6)
  • \(\frac{2}{3}\) of 9+x = \(\frac{1}{4}\)(x-6)
  • x+ \(\frac{2}{3}\) of 9=\(\frac{1}{4}\)(x+6)
Hand draw

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