The temperature was 38 degrees Fahrenheit before a cold front came through. Ten hours later, the temperature was -12 degrees Fah
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3y-2z=7
y=......equation(1)
Given x+2y-6=z
x=z-2y+6
putting value of y from equation(1)
By simplifying x=.....Equation(2)
Now putting the value of x and y in term of z in 3rd given equation
i.e 4+3x=2y-5z
i.e 2y-5z-3x=4
i.e 2()-5z-3(
)=4
By simplifying we will get -8z+14=24
i.e z=
Now putting z value in Equation(1);y=3/4
And putting z value in Equation(2);x=7/3 (Answer)