What must be the value of c when the expression 21.2x + c is equivalent to 5.3 (4x-2.6)?

The answer is c is 13.78

5.3(4x - 2.6) = 21.2x - 13.78
Comparing with 21.2x + c:-
the value of c = -13.78 Answer

Hi there! The answer is c = - 13.78

To find our answer we need to work out the parenthesis. This is for instance possible using rainbow technique.

[tex]5.3(4x - 2.6) = \\ 5.3 \times 4x - 5.3 \times 2.6 = \\ 21.2x - 13.78[/tex]

Therefore the value of c = - 13.78.
~ Hope this helps you!

Make the equations equal to each other to find x. 

21.2x+c=5.3(4x-4.6)

Now distribute. 

21.2x+c=21.2x-24.38

So c= -24.38