## All Tasks

#### Translate and solve 1

Translate the text into a linear equation that depends on x. Then solve this equation and enter the calculated x value into the free field.
"Multiply a number by 6, subtract 15 from it, add four times the number, you get the sum of 25 and 13."

# Linear equations

Training

9

#### Mathematical translation

Which of the equations fit the text? Mark with a cross.
"If you subtract the sum of 13 and 7 from 28, you get twice an unknown number."

# Terms with variables

# Linear equations

Reasoning

9

#### Solve the linear equation 6

Solve the linear equation and type the value of x in the solution field.
8⋅(x - 12) = - 411 - (x - 45)⋅7

# Linear equations

Training

9

#### Solve the linear equation 5

Solve the linear equation and type the value of x in the solution field.
3 ⋅ (x + 1) + 9 ⋅ (x - 3) = 4 ⋅ (x + 1) + 4

# Linear equations

Training

9

#### Solve the linear equation 4

Solve the linear equation and type the value of x in the solution field.
5 ⋅ (x - 3) = 4 ⋅ (x - 1)

# Linear equations

Training

9

#### Solve the linear equation 3

Solve the linear equation and type the value of x in the solution field.
12 + 5 ⋅(x + 8) = 92

# Linear equations

Training

9