5x+8=2x-1 someone please help me with this

x = -3

Step-by-step explanation:

5x+8=2x-1

Subtract 2x from each side

5x-2x +8 = 2x-2x-1

3x+8 = -1

Subtract 8 from each side

3x+8-8 = -1 -8

3x = -9

3x/3 =-9/3

x = -3

x = -3

Step-by-step explanation:

Subtract 2x from both sides:

5x + 8 = 2x - 1

-2x         -2x

3x + 8 = -1

Subtract 8 from both sides:

3x + 8 = -1

3x = -9

Divide both sides by 3:

x = -3

the perimeter is increased by a factor of 2

it's equivalent, so we can say that its equal.

let's call the denominator x and the numerador is 18 less then denominator, x - 18.

multiply

2.x = 5.(x - 18)

2x = 5x - 90

90 = 5x - 2x

90 = 3x

x = 90/3

x = 30

so: