Question

what is the value of Χ if Χ × 3+Χ = 180

Answer 1

Answer:

x(3+x)=180

3x + x^2 =180

x^2+3x-180=0

x^2+(15-12)x-180=0

x^2+15x-12x-180=0

x(x+15)-12(x+15)=0

(x+15)(x-12)=0

x= -15 ; +12

Answer 2

Answer:

3x+x=180

4x=180

x=180/4

x=45