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3 years ago

Help please!!!! Im really stuck.

Mathematics

1 answer:

Likurg_2 [28]3 years ago

3 0

Answer: 275 adults and 130 children

Step-by-step explanation:

<u>First, find the value of one variable by rearranging a equation:</u>

<u /> $a+c=405\\c=405-a$

<u>Substitute it into the other equation and solve for a:</u>

<u /> $12a+5c=3950\\12a+5(405-a)=3950\\12a+2025-5a=3950\\12a-5a=3950-2025\\7a=1925\\a=\frac{1925}{7} =275$

<u>Use the a-value to find b by substituting it into the rearranged equation:</u>

<u /> $c=405-a=405-275=130$

<u>Therefore, the answer would be:</u>

<u /> $\left \{ {{a=275} \atop {c=130}} \right.$

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