A) -8x = -16 (: (-8) )
x = 2
Б) -9y = 0 (: (-9) )
y = 0
В) 5a - 7 = 9-3a
8a=16 (: 8)
a = 2
Г) 21y - 5(2y-7)=19
21y-10y+35=19
11y=-16 (: 11)
y = -16/11 = -1 5/11
A) -8x = -16 (: (-8) )
x = 2
Б) -9y = 0 (: (-9) )
y = 0
В) 5a - 7 = 9-3a
8a=16 (: 8)
a = 2
Г) 21y - 5(2y-7)=19
21y-10y+35=19
11y=-16 (: 11)
y = -16/11 = -1 5/11