1323. Решите уравнения: x+1 2x-3 2 5 1) 2) 11-3x 4 = - + 2; x+13 6 - 3) 4) 5x+8 9 2 (2-3x) . 5 7x+10 6 +1 -- 3-4x 3. дам 100
Ответы
не сто но норм x + 1 = 2x - 3
x = 4
11 - 3x/4 = -2 + 2/(x + 13)
Multiplying both sides by 4(x+13), we get:
11(x+13) - 3x(x+13) = -8(x+13) + 8
11x + 143 - 3x^2 - 39x = -8x - 104
3x^2 + 58x + 247 = 0
Solving for x using the quadratic formula:
x = (-58 ± sqrt(58^2 - 43247)) / (2*3)
x = (-58 ± 8) / 6
x = -
Відповідь:
Покрокове пояснення:
1) -4x - 11 = -5x - 12, 2) 5(2x - 1) + x = 6, 3) 3x + 11 = 5x + 7(3x - 5),
-4x + 5x = -12 + 11, 10x - 5 + x = 6, 3х + 11 = 5х + 21х - 35,
x = -1; 11x - 5 = 6, 3х + 11 = 26х - 35,
11х = 6 + 5, 3х - 26 х = - 35 - 11,
11х = 11, -23х = -46,
x = 1; х = 2;
4) 3x - 4(5x + 2) = 3(7x - 2), 5) 17 - 2(3x - 5) - 5(4x - 1) = 6x,
3х - 20х - 8 = 21х - 6, 17 - 6x + 10 - 20x + 5 = 6x,
-17х - 8 = 21х - 6, -26x + 32 = 6х,
-17х - 21х = -6 + 8, -26x - 6х = -32,
-38х = 2, -32х = -32,
х = -2/38 = -1/19; х = 1;
6) -11x + 3(x - 3) = -8x - 9,
-11х + 3х - 9 = -8х - 9,
-8х - 9 = -8х - 9,
-8х + 8х = -9 + 9,
0х = 0,
х - любое число.