Annika biked 37 \text{ km}37 km37, start text, space, k, m, end text this morning and another x \text{ km}x kmx, start text, spa
2 answers:
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Let
x--------> the number of children
y------> the number of teenagers
z------> the number of adults
we know that
------> equation A
-----> equation B
-------> equation C
Substitute equation C in equation A and equation B
--------> equation D
--------> equation E
Multiply equation E by
--------> equation F
Adds equation D and equation F
therefore
<u>the answer is the option</u>