bamlakaklilu
bamlakaklilu
10-11-2016
Mathematics
contestada
-3x+3y=3
-5x+y=13
Solve for substitution
Respuesta :
intelplayz
intelplayz
11-11-2016
Take -5x + y =13 and rearrange for y:
y=13+5x
Substitute into other equation for y:
-3x+3(13+5x)=3
Multiply out brackets:
-3x+39+15x=3
Simplify:
12x+39=3
Rearrange for x:
12x=-36
x=-3
Substitute back into y=13+5x:
y=13+5(-3)
y=13-15
y=-2
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