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VA ROOOOG DAU COROANA (nu covid) Aflati x daca b) 3*{6*[5*(2x+34)-248]+12}=252

Răspuns :

3×{6×[5×(2x+34)-248]+12}=252

6×[5×(2x+34)-248]+12=252:3

6×[5×(2x+34)-248]+12=84

6×[5×(2x+34)-248]=84-12

6×[5×(2x+34)-248]=72

5×(2x+34)-248=72:6

5×(2x+34)-248=12

5×(2x+34)=12+248

5×(2x+34)=260

2x+34=260:5

2x+34=52

2x=52-34

2x=18

x=18:2

x=9

CosmyCrina

3*{6*[5*(2x+34)-248]+12}=252

6*[5*(2x+34)-248]+12=252:3

6*[5*(2x+34)-248]+12=84

6*[5*(2x+34)-248]=84-12

6*[5*(2x+34)-248]=72

5*(2x+34)-248=72:6

5*(2x+34)-248=12

5*(2x+34)=12+248

5*(2x+34)=260

2x+34=260:5

2x+34=52

2x=52-34

2x=18

x=18:2

x=9