А) -4(x-5)-3(x+4)=1-4x + 20 - 3x - 12 = 1-7x + 8 = 1-7x = -7x = 1
Б) -4(x+2) + 15x - (x+3) = -1-4x - 8 + 15x - x - 3 = -110x - 11 = -110x = 10x = 1
В) 2.3(3-x) - 4.5(2-6x) = 22.66.9 - 2.3x - 9 - 27 + 27x = 22.6-7.3x = 2.7x = -0.3699
Г) 1/2(5x-0.4) - 2(1/2x-2x) = 5.3(5/2)x - 0.2 - (x - 4) = 5.3(3/2)x - 4.2 = 5.3(3/2)x = 9.5x = 6.33
А) -4(x-5)-3(x+4)=1
-4x + 20 - 3x - 12 = 1
-7x + 8 = 1
-7x = -7
x = 1
Б) -4(x+2) + 15x - (x+3) = -1
-4x - 8 + 15x - x - 3 = -1
10x - 11 = -1
10x = 10
x = 1
В) 2.3(3-x) - 4.5(2-6x) = 22.6
6.9 - 2.3x - 9 - 27 + 27x = 22.6
-7.3x = 2.7
x = -0.3699
Г) 1/2(5x-0.4) - 2(1/2x-2x) = 5.3
(5/2)x - 0.2 - (x - 4) = 5.3
(3/2)x - 4.2 = 5.3
(3/2)x = 9.5
x = 6.33