Calculate the amount of heat needed to melt 126 g of solid ethanol and bring it to a temperature of 30.4 C
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Ответ:
-2x+8=x-1
add 2x to both sides
8=3x-1
add 1
9=3x
divide 3
3=x
sub
y=x-1
y=3-1
y=2
(x,y)
(3,2)