а) 2(х-3)=36. б)4(5-х)=12 в)0,1(х+1)=1 А) 4(х+1)+11=31 Б)16+3(z-2)=1
2х-6=36 20-4х=12 0.1х+0.1=1 4х+4+11=31 16+3z-6=1
2х=36+6 -4х=12-20 0.1х=1-0.1 4х=31-4-11 3z=1-16+6
2х=42 -4х=-8 0.1х=0.9 4х=16 3z= -9
х=21 х=2 х=9 х=4 z= -3
с) 3х+(7-х)=10 в) 8z-(5-3z)=17 д) 2х-(3-х)=18 г) 12у+(5-2у)=-15
3x+7-x=10 8z-5+3z=17 2x-3+x=18 12y+5-2y= -15
3x-x=10-7 8z+3z=17+5 2x+x=18+3 12y-2y= -15-5
2x=3 11z=22 3x=21 10y= -20
x=1.5 z=2 x=7 y= -2
1.3m(1-n)
2. 4x^3(2-3x^3)
3.(8+y)^2
4. 49 - c^2 7^2 - c^2 7^2 - c^2 1
= = : = (7^2 - c^2) * 9 =49*2 - 9c^2= 12^2 - (3c)^2 =
9 9 1 9
= (12-3c)(12+3c)
Вроде так