X/3-2=-y
x/2+2=-2}
3*x/3-3*2=3y
2*x/2+2*2=-2*2}
x+3y=6
x=-4-4}
x+3y=6
x=8}
-8+3y=6
y=14/3
(x,y)(-8,14/3)
Y-(y+4)+(y-4)=у-у-4+у-4=у-8
<h2><em>
1</em></h2>
1
-3,2+3,2=0
2
-5*(-38/15)=38/3
3
12*00.5-7=-6.4
4
3-1.5*(-1/3)=3.5
5
(2*(-1)-1/3)/(-1-3* 1/3) = -7/3 / -2 = 7/6
<h2><em>
2</em></h2>
а
76/5 - 23/2 = 37/10
б
36/5 * 25/12 = 15
в
4,5-5,8-13,7+2,4=-12,6
г
1,365 : (-0,21) = -1365/210 = -13/2
д
36/5 * 25/12 : (76/5-23/2) = 15 * 10/37 = 150/37
<h2><em>
3</em></h2>
а
17*32 / 100 = 2,24
б
33,48*100 / 54 = 62
в
38*100 / 200 = 19%
<h2>
<em>4</em></h2>
21/y=14/4
21*4=y*14
y=6
<h2><em>
5</em></h2>
----
1+3а=1+3*(-2,5)=1-7,5=-6,5