y=(2a-3)x+a-7
y=(4a-1)x+5-3a
2a-3=4a-1
2a-4a=-1+3
-2a=2 /:(-2)
a= - 1
y=(2a-3)x+a-7=(2·(-1)-3)x+( - 1)-7=(-2-3)x-1-7= - 5x - 8
y=(4a-1)x+5-3a =(4·(-1)-1)x+5-3·(-1) = ( -4-1)x+5+3 = - 5x+8
y=(2a-3)x+a-7
y=(4a-1)x+5-3a
2a-3=4a-1
2a-4a=-1+3
-2a=2 /:(-2)
a= - 1
y=(2a-3)x+a-7=(2·(-1)-3)x+( - 1)-7=(-2-3)x-1-7= - 5x - 8
y=(4a-1)x+5-3a =(4·(-1)-1)x+5-3·(-1) = ( -4-1)x+5+3 = - 5x+8