Question

ПОМОГИТЕ:   (7x-1)(x+5)=(3+7x)(x+3).

Answer 1

7X^2 + 35X - X - 5 = 3X + 9 + 7X^2 + 21X

7X^2 + 34X - 5 = 7X^2 + 24X + 9

34X - 24X = 9 + 5

10X = 14

X = 1.4