royaltyy6533
04.09.2019 •
Mathematics
If one tractor uses 1 gallon of gas to plant 10 acres of wheat, how many gallons of gas does it take to plant 165 acres of wheat
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Ответ:
x + y = 82
x - y = 24
To solve by elimination add the two equations together to get
2x = 106
x = 53
If one number is 53 substitute x=53 into the first equation.
53 + y = 82
y=82-53
y=29
Check in the other equation
53-29 = 24.
X+Y=82
X-Y=24 NOW ADD THESE 2 EQUATIONS
2X=106
X=106/2
X=53 SOLUTION
53+Y=82
Y=82-53
Y=29
53-29=24
24=24
SO THE ANSWER IS D.
HOPE I HELPED!!