Does anyone know 3x=-12?

x=-4

Step-by-step explanation:

Divide 3 on both sides since you use the inverse to cancel out each other but you need to do it on both sides to make the equation balance.

3 divided by 3x is x

3 divided by -12 is -4

x=-4

n=9

step-by-step explanation:

7 times a number = 7n

decreased by 13 = 7n-13

same as is =

5 times the number = 5n

increased by 5 = 5n+5

7n-13 = 5n+5

2n=18

n=9

y=3x+4

step-by-step explanation:

given the points a(0,4) and b(-4, -8)

eqn of line ab: (y-4)/(x-0)=(-8-4)/(-4-0)

(y-4)/x=-12/-4=3

y=3x+4