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Cat face 2×{12+3×[60-3×(27-4×3)]}-5x=64

Răspuns :

2×{12+3×[60-3×(27-4×3)]}-5x=64

=2×{12+3×[60-3×(27-12)]}-5x=64

=2×[12+3×(60-3×15)]-5x=64

=2×[12+3×(60-45)]-5x=64

=2×(12+3×15)-5x=64

=2×(12+45)-5x=64

=2×57-5x=64

=114-5x=64

=-5x=64-114

=-5×=-50

=10

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