Question

Work out the value of x when
X – 20 : x + 280
simplifies to
1:4

Answer 1

x = 120

Explanation:

Express the ratios as equivalent fractions, that is

`(x-20)/(x+280)` =
`(1)/(4)` ( cross- multiply )

4(x - 20) = x + 280

4x - 80 = x + 280 ( subtract x from both sides )

3x - 80 = 280 ( add 80 to both sides )

3x = 360 ( divide both sides by 3 )

x = 120

Answer 2

Solution for your question is X=120