Question

equação de 1 grau : y+10°+6y-40°=180°

Answer 1

10+6y-40=180
10+7y-40=180
7y=180+30
y=210/7
y=30

Answer 2

y + 10° + 6y - 40°=180

y+6y= 180°+ 40° - 10°

7y= 210°

y = 210
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7

y = 30