Question

Solve each system of equations by using elimination.

7)2t-u=17
3t+u=8

8)2j-k=3
3j+k==2

9)3c-2d=2
3c+4d=50

Answer 1

7. 5t= 25. 3(5)+u=8
t= 5. 15+u=8
u=-7

8. 5j= 5. 3(1)+ k= 2
j=1. k= -1

9. 6c - 4d= 4. 3(6)+4d= 50
3c +4d= 50. 18 + 4d= 50

9c = 54. 4d= 32
d= 8
c = 6