Answer:
Mystery Number is 8
Step-by-step explanation:
3x - 15 = 5 + 1/2x
3x - 1/2x = 15 + 5
5/2x = 20
x = 20 / 5/2
x = 20 * 2/5
x = 40 / 5
x = 8
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missing letter is 2
missing letter is 3
missing letter is 1
Hope it is helpful to you ☺️
The formula of a slope:
We have m = -2 and the points (0, d) and (-8, 9). Substitute: