Question

2x+4x+6x+...+300x-50=x+3x+5x+299x+100

Answer 1

x(2+4+6+.......300)-50=308x+100
2x(1+2+3+....150)-50=308x+100
2x  ×(150×151:2)-50=308x+100
2x×(75×151)-50=308x+100
2x×11325-50=308x+100
2x×11325=308x+100+50
22650x=308x+150
22650x-308x=150
22342x=150⇒x=150:22342
                     x=75/11171

Answer 2

2x+4x+6x+...+300x-50=x+3x+5x+299x+100
2x+4x+6x+...+300x-50=308x+100
Aplicam formula:
2+4+6+...+300=2* (1+2+3+4+..+150)
2+4+6+...+300=[2* ( 150*151)] :2
2+4+6+...+300=(2* 22650):2
2+4+6+...+300=45300:2
2+4+6+...+300=22650


22650x-50=308x+100
22650x-308x=100+50
22342x=150
x=150:22342

Sper ca te-am ajutat!!!