PILNE BARDZO PROSZE;)
w+15=15a
a-15+w=120
-15a+w=-15 *(-1)
a+w=135
15a-w=15
+------------
16a=150 I :16
a=9,375
-15a+w=-15
a+w=135 I*15
15a+15w=2025
+--------------------
16w=2010 I:16
w=125,625
spr.
9,375-15+125,625=120
120=120
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w+15=15a
a-15+w=120
-15a+w=-15 *(-1)
a+w=135
15a-w=15
a+w=135
+------------
16a=150 I :16
a=9,375
-15a+w=-15
a+w=135 I*15
-15a+w=-15
15a+15w=2025
+--------------------
16w=2010 I:16
w=125,625
spr.
a-15+w=120
9,375-15+125,625=120
120=120