Evaluate: 2m-13=-8m+27

Expression: $2m-13=-8m+27$

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

$2m-13+8m=27$

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

$2m+8m=27+13$

Collect like terms

$10m=27+13$

Add the numbers

$10m=40$

Divide both sides of the equation by $10$

$m=4$