Answer:
please check the attached file for the answer
Step-by-step explanation:
the explanation is in the attached file
It would be 40.
60 minus 20 = 40
Difference means subtraction
The price of less expensive equipment is $1575.
Step-by-step explanation:
Let,
Price of one equipment = x
Price of other equipment = y
According to given statement;
x+y=4000 Eqn 1
x = y+850 Eqn 2
Putting Eqn 2 in Eqn 1

Dividing both sides by 2;

Putting y=1575 in Eqn 2;

The price of less expensive equipment is $1575.
Keywords: linear equation, substitution method
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That might be the diameter of the circle