A pet store has 80 geckos and anole lizards altogether. The ratio of geckos to anole lizards is 3:5.
How many geckos does the pet store have?

30 geckos

Step-by-step explanation:

Write and solve an equation of ratios:

 geckos              g                3

= =  

  lizards           80 - g             5

This is true because the sum of the number of geckos and the number of lizards is 80.

Cross-multiplying:  5g = 240 - 3g.  Combining like terms, we get 8g - 240.

Thus, g = the number of geckos = 30

Note that the number of lizards and geckos together is 80.  Subtracting 30 from 80 yields 50, the number of anole lizards.

25/14 or 1.

step-by-step explanation:

the dots mean that it has infinitely more numbers behind it

multiplication is multiplication.   it might feel harder depending on what level of math you are in, but generally it will be the same old stuff, while implementing some new concepts and methods of solving work.