Hi, can someone me with this?

solve the system of equations:
y= 2x-4
x= y+1

Y=2x-4

X=y+1

2(y+1)-4

2y+2-4

2y-6

6=2y

6/2 =2y/2

y=3

x = 3+1

x=4

angle efh= angle egh

large crystals result from very slow cooling.

evaporation of water: this would produce an evaporite which is a sedimentary rock. like a salt pan in a desert. not possible to have volcanic rocks originate this way.

crystalization in molten earth: slow cooling over time. (hundreds to millions of years)

crystalization at earth's surface: this results in fast cooling. (a few hours to a few months or years)

crystalization from cooling off hot water: that would be a hydrothermal deposit. while associated with volcanics they are not volcanic rocks themselves and usually occur fairly rapidly.