If doubling a number and adding 20 to the result gives the same answer as multiplying the number by 8 andtaking away 4 from the product, find the number.

Doubling the number and adding 20 gives the same result as multiplying the number by 8 and subtracting 4.

Simple algebraic equation in one variable;

ax + b = 0

where, a and b are constant.

Let the number be x.

According to the question,

2x + 20 = 8x - 4

=> 8x - 2x = 20 + 4

=> 6x = 24

=> x = $$\frac{24}{6}$$​​

=> x = 4