Find the length of the segment MB if AB-12.3 AM-7.4cm.

Given a segment AB = 12.3 cm. Point M divides segment AB into two segments – AM and MB, therefore:

AB = AM + MB.

Substitute the data for the value condition:

12.3 = 7.4 + MB.

The result is a linear equation with one variable. Let’s solve the resulting equation. We transfer to the left side of the equation all terms with a variable, and we transfer all natural terms to the right side of the equation (when transferring the sign of the term, it is necessary to change to the opposite):

– MB = 7.4 – 12.3;

MB = 12.3-7.4;

MB = 4.9 cm.

Answer: MB = 4.9 cm.