Question

12+5x-[-(-x+6)-2+4x]+5=7x+6

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Answer 1

12+5x-[-(-x+6)-2+4x]+5=7x+6

=     12+5x-[x-6-2+4x]+5=7x+6

=     12+5x-[5x-8]+5=7x+6

=     12+5x-5x+8+5=7x+6

=      25=7x+6

=      25-6=7x

=      19=7x

=       19/7=x