lopezsharon333
21.10.2020 •
Mathematics
Need help with some practice
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Ответ:
51°
Step-by-step explanation:
(x+6)°+(3x-30)°=180°=
x+6+3x-30=80
x-24+3x=180
4x-24=180
4x-24+24=180+24
4x=204
x=51°
Ответ:
5(12−8)−13+12−2(4−3)
=17