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1. Solve the equations...

1. Solve the equations by substition.

2x+y=12

y=4x

2. Solve the system using the substitution method.

x-10y=57

7y-8x= -91

3. 3x+4y=2

x+y=2

4. 15x-10y=5

15y= -5+10x

5. 18x-2y=14

y=9x+7

6. 24x-21y=9

8x=7y+3

9. 0.1x+0.5y= -2.7

0.3x-0.9y=8.7

10. 0.07x-0.01y=0.2

0.23x+0.14y=9.3

2x+y=12

y=4x

2. Solve the system using the substitution method.

x-10y=57

7y-8x= -91

3. 3x+4y=2

x+y=2

4. 15x-10y=5

15y= -5+10x

5. 18x-2y=14

y=9x+7

6. 24x-21y=9

8x=7y+3

9. 0.1x+0.5y= -2.7

0.3x-0.9y=8.7

10. 0.07x-0.01y=0.2

0.23x+0.14y=9.3

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