1)х+х+30=180
2х=180-30
2х=150
х=75
х+30=105
2)х+х+40=180
2х=180-40
2х=140
х=70
х+40=110
3)3х+х=180
4х=180
х=45
3х=135
4)2х=180
х=90
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Answers & Comments
1)х+х+30=180
2х=180-30
2х=150
х=75
х+30=105
2)х+х+40=180
2х=180-40
2х=140
х=70
х+40=110
3)3х+х=180
4х=180
х=45
3х=135
4)2х=180
х=90