(8+4х):2=х-5
8+4х=2(х-5)
8+4х=2х-10
4х-2х=-10-8
2х=-18
х=-9
<span>1)
10-3*(5x - 1.5) = 2.5-5x
10-15x+4.5 = 2.5-5x
-10x=-12
x=-12/-10 = 1.2
2)
</span><span>2(3x -4) = 5x -3 (x+1)
6x-8=5x-3x-3
4x=5
x= 5/4
</span>
У=-10х-9
у=-24х+19
-10х-9=-24х+19
14х=28
х=2
у=-10*2-9=-24*2+19=-29
(.) (2;-29)
X+3^2=04x^2=0x^2=4x=+-2x1=2;x2=-2