Expression 3143

Determine the value of the expression 3x / 2 - 5/2 - 0,5x + 1 for x:
a) x = 3
b) x = -3
c) x = 0

Correct answer:

a =  1.5
b =  -4.5
c =  -1.5

Step-by-step explanation:

x=3 a=3⋅ x/2−5/2−0.5⋅ x+1=3⋅ 3/2−5/2−0.5⋅ 3+1=1.5
x=−3 b=3⋅ x/2−5/2−0.5⋅ x+1=3⋅ (−3)/2−5/2−0.5⋅ (−3)+1=−4.5
x=0 c=3⋅ x/2−5/2−0.5⋅ x+1=3⋅ 0/2−5/2−0.5⋅ 0+1=−1.5

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