What is th evalue of the expression when b=5

B (2b-4)

b=5

The way to solve a simultaneous equation is to substitute the number value of the given letter into the expression. It then becomes 5 (2 (5) - 4).

you can put this into your calculator or just work it out by hand.

5 (2 (5) - 4) = 30

5x (2x (5) - 4)

5x (10-4)

5x (6)

=30