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130005401
04.11.2020 •
Mathematics
The sum of three numbers is 19 two times the first number is increased by six times the second number plus the third number is 12 why in the number is the Sims requirements below can best be used to determine the three numbers
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Ответ:
Step-by-step explanation: x+ y+z=19 ...(1)
2x+6y+z=12 ...(2)
3x+8y+z=-14 ...(3)
(2)-(1) gives
x+5y =-7 ...(4)
(3)-(1) gives
2x+7y= -33 ...(5)
multiply (4) by 2
2x+10y=-14 ...(6)
(6)-(5) gives
3y=19
y=19/3
x+95/3=-7
x=7+95/3=(21+95)/3=116/3
from (1)
116/3+19/3+z=19
(116+19)/3+z=19
135/3+z=19
45+z=19
z=19-45=-26
Ответ:
Step-by-step explanation:
hi if this is what ur lookin for. ..there ya go !!! please give me brainliest
so tis aproximately 0.382