+130555 20≥−3.2(c−4.3) divide both sides by -3.2 and reverse the inequality sign
20/ - 3.2 < c - 4.3 add 4.3 to both sides
20/ -3.2 + 4.3 < c
[-20] / [ 32/10] + 43/10 < c
[-20 * 10] / 32 + 43/10 < c
-200/32 + 43/10 < c
-25/4 + 43/10 < c
[-250 + 172] / 40 < c
-78/40 < c
-39 / 20 < c
