The system of equations is [tex]t+b=25\\b=t+7[/tex]
Step-by-step explanation:
We can answer this question as follows.
First of all, we call:
t = number of treadmills
b = number of stationary bikes
The two conditions that we have can be translated into equations as follows:
- The gym has a total of 25 treadmills and stationary bikes:
[tex]t+b=25[/tex]
- There are seven more stationary bikes than treadmills:
[tex]b=t+7[/tex]
So the system of equations to solve is
[tex]t+b=25\\b=t+7[/tex]
We now solve it in the following way: first, we rewrite the second equation by bringing t on the left side,
[tex]t+b=25\\b-t=7[/tex]
Now we add the 1st equation to the 2nd equation:
[tex](t+b)+(b-t)=25+7\\t+b+b-t=32\\2b=32\\b=\frac{32}{2}=16[/tex]
And therefore,
[tex]t+b=25\\t+16=25\\t=25-16=9[/tex]
So, there are 16 stationary bikes and 9 treadmills.
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