Question

How would you find x?

Answer 1

Explanation:

n (TUB)=100-20

=80

from formula,

80 = x (x-5)+x+2x

80= x^2-5x+3x

80=x^2-2x

x^2-2x-80=0

x^2-10x+8x-80=0

x(x-10)+8 (x-10)=0

(x+8)(x-10)=0

either,

x+8=0

×=-8 (neglected)

Or,

x-10=0

×=10