Question

What must be added to 5x to get 3x + 4.​

Answer 1

As per the data given in the question,

In the above question, it is given that,

The given equation is 5x.

What must be added to 5x to get 3x + 4.

Thus B should be added to get 3x+4.

Therefore,

$B+5x-(5x)=3x+4-(5x)\\B=3x+4-5x\\B=x(3-5)+4\\B=-2x+4$

Hence $-2x+4$ should be added to 5x to get the value $3x+4$.

Answer 2

in the above question it is given that

The given data in equation $5X$

The given equation $5X$to get $3X+4$

Hence we should adding the value of $3X+4$

$B+5X-(5X)=3X+4-(5X)\\B=3X+4-5X\\B=X(3-5)+4\\B=-2X+4$

Hence the added value of $-2X+4$  

further $5X$ to get $3X+4$  added value of $-2X+4$.