Zusammenfassung der Ressource
Solving a System of Equations
- Addition
- x+y=15 and x-y=3
- added together we get 2x+0y=18
- x=9
- 9+y=15
- y=6
- Subtraction
- x+y=15 and x-y=3
- subtract and we get 0x+2y=12
- y=6
- x+6=15
- x=9
- Subsitutition
- x+y=15 and x-y=3
- x=y+3
- (y+3)+y=15
- 2y=12
- y=6
- x-6=3
- x=9