(x+6)(x-7)=-x+7 Help me!!!!!!

Question

(x+6)(x-7)=-x+7 Help me!!!!!!

Answer 1

(х+6)(х-7)=-х+7
x2-7x+6x-42=-x+7
x2-7x+6x+x=7+42
x2=49
x=+/-7

Answer 2

X^2 - x - 42= - x+7
x^2= 49
x= 7 и x= - 7