СРОЧНО!!!!решите уравнения:20-5(3х-1)=9,.(4х+3)-(10х+11)=7+(13-4х),(3х-1)=35х-25,.6х-5(3х+2)=5(х-1)-8,х/4-[-3/5=-1
1)
20-5(3х-1)=9
20-15х+5=9
-15х=9-25
-15x = -16
x = -16 : (-15)
x = 1 ¹/₁₅
2)
(4х+3)-(10х+11)=7+(13-4х)
4х+3 - 10х-11 = 7+13-4х
4x-10x+4x = 7+13-3+11
- 2x = 28
x = 28 : (-2)
x = - 14
3)
(3х-1)=35х-25
3х-35x = 1 -25
-32x = - 24
x = -24 : (-32)
x = ³/₄ = 0,75
4)
6х-5(3х+2)=5(х-1)-8
6х-15х-10 = 5x-5-8
-9x-5x = - 13+ 10
- 14x = - 3
x = - 3: (-14)
x = ³/₁₄
5)
5x-4x+12+20=0\\\\x=-32" alt="\frac{x}{4}-\frac{x-3}{5}=-1\\\\\frac{x*5}{4*5}-\frac{(x-3)*4}{5*4}+\frac{1*20}{20}=0\\\\\frac{5x-(4x-12)+20}{20}=0\\\\=>5x-4x+12+20=0\\\\x=-32" align="absmiddle" class="latex-formula">