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3 years ago

11

Solve for y : 3x+5y=10

2 answers:

Katyanochek1 [597]3 years ago

8 0

3x+5y=10
how to solve for 3x-5y = 9
where; x= -1, 0, 1

(x=-1, y= - 2.4) ;    ( x=0, y = -1.8)      (x=1, y= - 1.2)
in x = -1       in x = 0    in x = 1
3 (-1)- 5y = 9    3(0)- 5y = 9     3 (1)- 5y = 9
   -3-5y = 9       -5y =   9    3-5y = 9
   -5y = 9+3     -5 -5    5y = 9-3
   -5y = 12 (cancel -5)    5y = 6
   -5 -5    y= -1.8 5 -5
(cancel -5)    (cancel -5)
   y= -2.4 y= -1.

OLEGan [10]3 years ago

3 0

3x + 5y = 10 Subtract 3x from both sides. 5y = -3x + 10 Divide both sides by 5. y = -3/5x + 2

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