alexislacour73
13.12.2019 •
Mathematics
3x-30=y
7y-6=3x
using elimination
Solved
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Ответ:
x=12, y=6. (12, 6).
Step-by-step explanation:
3x-30=y
7y-6=3x
7y-6-30=y
7y-36=y
7y-y-36=0
6y-36=0
6y=0+36
6y=36
y=36/6
y=6
7(6)-6=3x
42-6=3x
36=3x
x=36/3
x=12
Ответ:
61
Step-by-step explanation:
a triangle is 180 all together so if u add 78 and 41 = 61 . Then you subtract 119 from 180 and u get 61