1 делим на 6 и получаем 0.1(6...)
1)<span>9*(x-1) = x+15
</span><span>9*x-9*1 = x+15
</span><span>9*x = 24 + x
</span><span>8*x = 24
</span><span>x = 3
</span>
2)<span>(11*x+14)-(5*x-8) = 25
</span><span>11*x+14-5*x+8 = 25
</span><span>22 + 6*x = 25
</span><span>6*x = 3
x=</span>
![\frac{1}{2}](https://tex.z-dn.net/?f=+%5Cfrac%7B1%7D%7B2%7D+)
3)<span>12-4*(x-3) = 39-9*x
</span><span>12-4*x+4*3 = 39-9*x
</span><span>-4*x = 15 - 9*x
</span><span>5*x = 15
x=3
4)</span><span>2*(3*x+5)-3*(4*x-1) = 11.8
</span><span>2*3*x+2*5-3*4*x+3*1 = 11.8
</span><span>13 - 6*x = 11.8
</span><span>-6*x = -1.2
</span><span>x = 0.2</span>
Очень весело..................................
А)0,26z+0,37z-0,23z=0.4z
при z=5
0,4*5=2
при z=300
0.4*300=120
б)63t-48t+25t=40t
при t=12.4
40*12.4=496