x+(4+x)+x=16
x+5x+x=16
x+6x=16
7x=16
x=16:7=2,28571
Пошаговое объяснение:
х+(4+x)+х=16
3x + 4 = 16
3x = 12
x = 4
(12х-24)=3х
12x - 3x = 24
9x = 24
x = 24/9
-5х+35=-(-3х+12)+27
-5x - 3x = -35 - 12 +27
8x = 20
x = 20/8
3х+(4х-6)=8-(7х-14)
3x + 4x + 7x = 6 + 14
14x = 20
x = 20/14
