Question

Află numărul necunoscut: [(y+150:5)×3+200]:400=2 va rog

Answer 1

[(y+150:5)x3+200]:400=2
(y+30)x3+200=2x400
(y+30)x3+200=800
(y+30)x3=800-200
y+30x3=600
y+30=600:3
y+30=200
y=200-30
y=170

Answer 2

[(y+150:5)×3+200]:400=2

[(y+30)x3+200]=2x400

[(y+30)x3+200]=800

[(y+30)x3]=800-200

[(y+30)x3]=600

y+30=600:3

y+30=200

y=200-30

y=170