Question

Subtract:

$-5\mathrm{b}$ from $8\mathrm{b}$.

Answer 1

Arrange the variables in proper columns and subtract them,

$8\mathrm{b}-(-5\mathrm{b})=8\mathrm{b}+5\mathrm{b}$

$8\mathrm{b}+5\mathrm{b}13\mathrm{b}$

Hence, $8\mathrm{b}-(-5\mathrm{b})=13\mathrm{b}$.