Question

Mathematics riddle
1. Find the value of x :- 5 : 2 :: x : 30
2. Solve 2x - 2 = 6

Answer 1

Answer:

2. 2x-2= 6

2x = 6+2 = 8

x = 8÷2 =4

So, x =4

Answer 2

5 : 2 :: x : 30

$\longrightarrow\bf{\dfrac{5}{2} = \dfrac{x}{30}}$

$\longrightarrow\bf{5\times 30 = x\times 2 }$

$\longrightarrow\bf{150 = x\times 2 }$

$\longrightarrow\bf{x = \dfrac{150}{2} }$

$\longrightarrow\bf{x = 75 }$

Solve 2x - 2 = 6

$\longrightarrow\bf{2x = 6 + 2 }$

$\longrightarrow\bf{2x = 8 }$

$\longrightarrow\bf{x = \dfrac{8}{2} }$

$\longrightarrow\bf{x = 4}$