oofmath
oofmath
12-07-2018
Mathematics
contestada
-x+4(x+3)=9 substitution method
Respuesta :
yuumyllo
yuumyllo
12-07-2018
-x+4(x+3) = 9
Multiplying...
-x+4x+12=9
So,
3x + 12 = 9
Now, subtract
12
from both sides.
3x + 12 - 12 = 9 - 12
3x = -3
Then, divide by
3
.
3x/3 = -3/3
x = -1
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