Math
Solve for 3x - 5y = 42 and - 3x - y = - 6
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Asked by
AnneS2
Last updated by
anonymous
- 3x - y = - 6
- 3x - y+y = - 6+y
-3x= - 6+y
-3x+6= - 6+y+6
-3x+6=y
3x - 5y = 42
3x - 5(-3x+6) = 42
3x - 5(-3x) (5)(+6) = 42
3x+15x+30=42
18x+30=42
18x+30-30=42-30
18x=12
18x/18=12/18
x=2/3
-3x+6=y
-3(2/3)+6=y
-3(2/3)+6=y
-2+6=y
4=y