Question

rezolva ecuatia:2×{12+3×[60-3×(27-4×3)]}-5x=7

Answer 1

2x{12₊3×[60-3x(27-12)]}-5x=7 /    2x{12+3[60-3x15]}-5x=7 /  2x{12+3x[60-45]}-5x=7 /     2x{12+3x15}-5x=7 /    2x{12+45}-5x=7 /    2x57-5x=7 /   114-5x=7 /   5x=114-7 /   5x=107 /   x=107 : 5 /   x=21,4