Calculate: -48=4(2-3r)-2r

Expression: $-48=4\left( 2-3r \right)-2r$

Distribute $4$ through the parentheses

$-48=8-12r-2r$

Collect like terms

$-48=8-14r$

Move the variable to the left-hand side and change its sign

$-48+14r=8$

Move the constant to the right-hand side and change its sign

$14r=8+48$

Add the numbers

$14r=56$

Divide both sides of the equation by $14$

$r=4$