1)y=х+19
y-x=19=>-x=-y+19=> x=y-19
y=y-19+19=> y=y
2)g=19-x
x= -g+19
g=19-((-g)+19)
g=g
3)y=3x-7
-3x=-y-7=>X= (y+7)/3
3) y=8+2x
X=(y-8)/2
4)y=5x+4
X=(y-4)/5
5)y=14-5x
y+5x=14
5x=-y+14
X= (-y+14)/5
y=14-(-y+14)
y=14+y-14
y=y
1)y=х+19
y-x=19=>-x=-y+19=> x=y-19
y=y-19+19=> y=y
2)g=19-x
x= -g+19
g=19-((-g)+19)
g=g
3)y=3x-7
-3x=-y-7=>X= (y+7)/3
3) y=8+2x
X=(y-8)/2
4)y=5x+4
X=(y-4)/5
5)y=14-5x
y+5x=14
5x=-y+14
X= (-y+14)/5
y=14-(-y+14)
y=14+y-14
y=y