Question

320-(b*4+120):5=40*6

Answer 1

320 - 4b -120:5= 240
320 -4b-24=240

80-4b-24=0

80-24=4b

4b=56

b=14

Answer 2

320-(b*4+120):5=240

(b*4+120):5=320-240

(b*4+120):5=80

b*4+120=400

b*4=280

b=280:4

b=70