chikitagee 3 years ago would you use substitution or elimination to solve each of the following systems? a. {y=2x+1 y=3x-2 b. {x=3y-1 3x+5y+4 c.{4x-3y=4 3x+5y=16

1. A.Avinash_Goutham

1 st one i think both methods are cool

2. A.Avinash_Goutham

2nd sub nd third elimination

3. chikitagee

how are they substitution and elimination tho?

4. SmileD

substitution let the value of y in the A) 1st equation be the value of y in the second equation

5. A.Avinash_Goutham

u kno sub method it means u put value of variable obatained from an eq into another eq......

6. chikitagee

sorry im new to all this algebra stuff lol

7. A.Avinash_Goutham

like check the secon eq......u have the eqn for x...... nd u can put that easily in 3x+5y+4

8. A.Avinash_Goutham

wow um ther's an = missing

9. chikitagee

opps b. {x=3y-1 3x+5y+4

10. A.Avinash_Goutham

i think it's 3x+5y = 4

11. chikitagee

omg i just did that ughh lol

12. chikitagee

so what about the third problem how is it elimination?

13. A.Avinash_Goutham

coz it's not substitution.............it's kinda hard to isolate a variable(x/y) from either of the eqns........

14. chikitagee

oh okay thanks :)