Question

2. Розв'яжи рівняння.
a) 0 . x = 3;
б) 7x + 5 = x - 1;
-
B)
x + 2
3
+
X
4
|
x +5
+60

Answer 1

7x - x + 5 = -1

6x + 5 = -1

6x = -1 - 5

6x = -6

x = -6 / 6

x = -1

(x + 2)/3 + x/4 = (x + 5)/60

60[(x + 2)/3 + x/4] = 60[(x + 5)/60]

20(x + 2) + 15x = x + 5

20x + 40 + 15x = x + 5

7x + 8 = x + 5

6x + 8 = 5

6x = 5 - 8

6x = -3

x = -3 / 6

x = -1/2