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Challenging task for "from natural to algebraic language"

Translate the following sentence in algebraic language: The quintuple of a number subtracted to its triple is equal to its double.

# Numbers & operations

Training
8

Challenging task for Common elements in different expressions

What do the following mathematical expressions have in common? $(x-2)^4; |-3|; 5; x^2+1.$

# Numbers & operations

Reasoning
9

Common elements in different expressions

What do the following mathematical expressions have in common? $3 \cdot 5a$, $(x+y) \cdot 3$, $9v$, $3z+3w$, $\frac{6c}{2}$

# Terms

Reasoning
8

Modeling bakery

A baker cooks 9 apple pies and 12 chocolate pies for each gram of yeast he has in a day. Everyday 1/3 of the cooked cakes doesn't grow well, so the baker can't sell them. Can you tell how many cakes the baker can sell everyday for each gram of yeast he has?

# Terms with variables

Modeling
7

Let's walk it!

Choose the program that will walk Scratch the cat along the spirale of integers! (see the first hint for a reminder)

# Unassigned

Modeling
5

The cube

Written with this little fancy three up in the air, the cube of a number is simply this number multiplied by itself twice. For example $2^3=2\times 2\times 2=8$. Compute the cube of the following numbers:

# Monomials & polynomials

Learning
8