Jasten
02.07.2019 •
Mathematics
Solve using elimination. 10x + y = -19 10x + 3y = -17
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Ответ:
Subtract 10x
10x + y = -19
10x + 3y = -17
You would get:
-2y = -2
Two negatives make a positive number! Divide
y = 1
Plug in
10x + (1) = -19
10x = -20
Divide
x = -2
Your solutions are
x = -2
y = 1
Ответ:
we want to add the 2 equations to eliminate a variable
see which constants match
the x's both have 10
multiply the first equation by -1
-10x-y=19
add that to the 2nd equation
-10x-1y=19
10x+3y=-17 +
0x+2y=2
so 2y=2 -> y=1
subsitute to find other number
10x+y=-19
10x+1=-19
10x=-20
divide both sides by 10
x=-2
the solution is (x,y)=(-2,1)
Ответ:
sorry dude i have no idea
Step-by-step explanation: