Respuesta :
3(-4b - 9) = 21
3 * -4 = -12 3 * -9 = -27
-12b - 27 = 21
+27 +27
-12b = 48 “Divide both sides by 12b”
n = -4
3 * -4 = -12 3 * -9 = -27
-12b - 27 = 21
+27 +27
-12b = 48 “Divide both sides by 12b”
n = -4