-2m = 16m - 9 First, take '16m' from both sides. Second, add '-2m - 16m' to get '-18m'. Third, divide both sides by '-18'. Fourth, change the fraction into a negative. Fifth, find the GCF of 9 and 18. The GCF is 9. Sixth, divide the numerator by the GCF. ÷ Seventh, divide the denominator by the GCF. ÷ Eighth, rewrite the fraction in simplest form.