Question

I have a question from my homework. 2x-1=r if r=4x​

Answer 1

It sounds like you want to solve for x. If so, then follow these steps:

2x-1 = r

2x-1 = 4x ... replace r with 4x

2x-1-2x = 4x-2x ... subtract 2x from both sides

-1 = 2x

2x =  -1

2x/2 = -1/2 .... divide both sides by 2

x = -1/2 is the fractional solution for x

x = -0.5 is the decimal solution for x.

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If you want to figure out the value of r, then plug the x solution into the equation below and simplify

r = 4x

r = 4(-1/2)

r = -2