What is the value of -a a=-4.2 a.-4.2 b.4.2

4.2

Step-by-step explanation:

a = -4.2

Divide both sides of the equation by -1:-

a / -1 = -4.2 / -1

-a = 4.2

step-by-step explanation:

you can add the two numbers and divide the result by 2. or you can find the gap between the two numbers and add half of this to the smaller number.

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step-by-step explanatio89