What is the value of x

15

Step-by-step explanation:

90=30+4x

subtract 30 from both sides

60=4x

divide both sides by 4

15=x

x=15

Step-by-step explanation:

You know that the total of the angel is 90. This means that if we add 30 and 4x, we will get 90.

90=30+4x

60=4x

15=x

to plot points   for x just start at the origin (middle) and go to the left however many times it say(if the number is a positive) if the number is a negative then go right however many times it says if it is 0 go nowhere

now keep you pencil there and go up however many times it says on y(if it is positive) if it is negative then go down however many times it says. if it says 0 go nowhere.

you have just plotted a point! now when you finish plotting all of them connect them with a ruler

plot each point as (-3, 7), (0,4), (3,1), (8,-4)   in the parenthesis on the left of the comma is x and the right is y.

1.0

step-by-step explanation: