Question

Find ‘x’ if the given numbers are in proportion 25 : x :: 1 : 4


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Answer 1

Step-by-step explanation:

25 : x :: 1 : 4

25/x = 1/4

(cross multiplication)

(25×4) = (x×1)

100 = x

x = 100 (ans.)

Answer 2

Answer:

x= −1 /5   or x= −4 /5

Step-by-step explanation:

Let's solve your equation step-by-step.

25x(x+1)=−4

Step 1: Simplify both sides of the equation.

25x2+25x=−4

Step 2: Subtract -4 from both sides.

25x2+25x−(−4)=−4−(−4)

25x2+25x+4=0

Step 3: Factor left side of equation.

(5x+1)(5x+4)=0

Step 4: Set factors equal to 0.

5x+1=0 or 5x+4=0

x= −1 /5   or x= −4 /5