Question

determinati numerele naturale care verifica egaliatatile:    c) (x+200):20=45    e) 4x-1000:50-620:4=5

Answer 1

x+200=45·20
x+200=900
x=900-200
x=700
700+200):20=45
900:20=45
e)
4x-20-155=5
4x-175=5
4x=175+5
4x=180
x=180/4
x=45
4·45-1000:50-620:4=5
180-20-155=5
160-155=5

Answer 2

c) (x + 200) : 20 = 45
x + 200 = 45 * 20
x = 900 - 200
x = 700
e) 4x - 1000 : 50 - 620 : 4 = 5
4x - 20 - 155 = 5
4x = 5 + 175
4x = 180
x = 180 : 4
x = 45