(1) on the number line, 0 is closer to x – 1 than to x
x is positive, let x = 5, then x-1 = 5-1 = 4, then zero is close to 4 than 5
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(2) on the number line, 0 is closer to x than to x + 1
x is positive, as zero is close to 5 than 5+1=6
I hope that helps!