Răspuns :
2x+3x+150-x+x=360( grade )
5x=360( grade ) -150
x=360(grade):5-150:5
x=72(grade)-30
x=(aproximativ ) -28,743
5x=360( grade ) -150
x=360(grade):5-150:5
x=72(grade)-30
x=(aproximativ ) -28,743