1. 2x+y=6 x=2 y=2
2. 5x+y=7 x=1 y=2
3. 3x+2y=8 x=2 y=1
4. 2x+5y=10 x=0 y=2

Percents

My job would be septic tank cleaner.

1. 540/1200=45%

2. .o6*1200=$72

3. 200/1200=16%

4. 40*4/1200=13%

5. 1200-972=228 left over 228*.6=136.8 on entertainment and 91.3 in savings