Question

Реши уравнение
5.1-(b+1.2)=7

Answer 1

5,1-(b+1.2)=7

5.1-b-1.2=7

3.9-b=7

-b=7-3.9

-b=3.1

b=-3.1

Answer 2

$5.1 - (b + 1.2) = 7 \\ 5.1 - b - 1.2 = 7 \\ 3.9 - b = 7 \\ - b = 7 - 3.9 \\ - b = 3.1 \\ b = - \frac{31}{10} = - 3.1$