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5x [x:3-7x (24+30:5)]-23=27

Răspuns :

5x [x:3-7x (24+30:5)]-23=27
5x [x:3-7x (24+6)] = 27+23
5x [x:3-7x 30] = 50
x:3- 210 = 50:5
x:3 - 210 = 10
x:3 = 10+210
x:3 = 220
x = 220×3
x = 660