Answer:
f= -9/20
Step-by-step explanation:
20f-9=-18
+9 +9
20f = -9
Hope this helps :)
f = - 9/20
f = - 0.45
Hi there !
20f - 9 = - 18
20f = - 18 + 9
20f = - (18 - 9)
20f = - (9)
f = - 9⁽²/20
f = - 4.5/10
Good luck !