A) 2x -1.5 = 2x - 1.5
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b) 2v + 4 = -1

a) all real numbers

b) v = -2.5

Step-by-step explanation:

a) 2x - 1.5 = 2x - 1.5

subtract 2x from both sides of the equation

2x - 1.5 - 2x = 2x - 1.5 - 2x

1.5 = 1.5

since 1.5 will always equal 1.5 regardless of what x is,

the solution is all real numbers

b) 2v + 4 = -1

subtract 4 from both sides of the equation

2v + 4 - 4 = - 1 - 4

2v = -5

divide both sides of the equation by 2

2v/2 = -5/2

v = -2.5

x is variable or an unknown value to find

example:

2x = 5 which means x = 3

true

explanation: