9x + 3 = 30

9x + 3 - 3 = 30 - 3

9x = 27

9x/ = 27/

x = 3

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Step-by-step explanation:

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step-by-step explanation:

look at the picture.

y-intercept for the function on a picture is 4 → point (0, 4).

y-intercept for the function

is for x = 0. substitute:

y-intercept is 8 → point (0, 8).