When placed end to end, three red rods are 2 cm longer than than 2 blue rods. Three blue rods are 2 cm longer than four red rods. How long is each rod?

Red = 10 cm, blue = 14 cm

Step-by-step explanation:

Let the length of each red rod be r and each blue rod be b

Then we have:

Multiply the first equation by 3 and the second one by 2:

Add the equations to eliminate one of variables:

Find the value of b:

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