20 B PLEASE HELP!! Question 12

The number is -12

Step-by-step explanation:

(x+5) *8 = -56

Divide each side by 8

(x+5)*8/8 = -56/8

x+5 = -7

Subtract 5 from each side

x+5-5 = -7-5

x = -12

X=12

I have had a test on this i forgot my explanation tho.

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:

ddd

step-by-step explanation: