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2x = 5x - 4y
x=y+1
2* (y+1) = 5 (y+1) - 4y
x=y+1
2y+ 2 = 5y + 5 - 4y /-2y
x=y+1
2= -y +5 /-5
x=y+1
-3 = -y / *(-1)
x=y+1
y=3
x=3+1
y=3
x= 4
y=3
2x=5x-4y
x=y+1
-3x=-4y
-3(y+1)=-4y
-3y-3=-4y
y=3
x=3+1
x=4