Question

Решите пожалуйста уравнения:
1) X-(-1)-3=-4
2) (-2)+X-(-3)=5
3) (-4)+X-(-8)+4=7
4) X-(-5)+4,7=-11

Answer 1

1) x - (-1) -3 = -4
x + 1 - 3 = -4
x - 2 = -4
x = -2

2) (-2) + x - (-3) = 5
-2 + x + 3 = 5
-2 + x = 2
x = 4

3) -4 + x - (-8) + 4 = 7
-4 + x + 8 + 7 = 7
-4 + x + 15 = 7
x + 11 = 7
x = -4

4) x - (-5) + 4.7 = -11
x + 5 + 4.7 = -11
x + 9.7 = -11
x = -20.7