Solve the equation for
x 3/4(x+21) = 10.5
x =

10.5x>21+6.3x

Subtract 6.3x from both sides.

10.5x−6.3x>21

Combine 10.5x and −6.3x to get 4.2x.

4.2x>21

Divide both sides by 4.2. Since 4.2 is positive, the inequality direction remains the same.

x>

4.2

21

​

Expand  

4.2

21

​

 by multiplying both numerator and the denominator by 10.

x>

42

210

​

Divide 210 by 42 to get 5.

x>5

Step-by-step explanation:

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.

y = 3x+4

step-by-step explanation:

to find the slope

slope = (y2-y1)/ (x2-x1)

    = (-8-4)/ (-4-0)

    = -12/-4

  = 3

using the slope intercept form of a line

y= mx+b

we know the slope is 3

we know the y intercept is 4 ( the point where it crosses the y axis or x=0)

y = 3x+4