Answer:
x = 5
Step-by-step explanation:
x + 15 = 20
x = 20 - 15
X = 5
If X = 5 then 5+15 = 20
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-4y+3=-4(y+6)
-4y+3=-4y+24
-4y+4y=24-3
0=21
Let the number be n.
Twice the number: 2n.
Seven less than twice the number: 2n - 7.
B negative.