" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
(2x - 7) - (3x + 5) = -(-2 - x) - (x - 3)
2x - 7 - 3x - 5 = 2 + x - x + 3
-x - 12 = 5
-x = 5 + 12
-x = 17
x = -17
b)
-(-3x + 4) + 2(x + 11) - 5 = -(5x - 2) + (-3x - 2)
3x - 4 + 2x + 22 - 5 = -5x + 2 - 3x - 2
5x + 13 = -8x
5x + 8x = -13
13x = -13
x = -1
c)
x/4 + 2x/8 = x/2 - x/16
x/4 + x/4 - 2x/4 + x/16 = 0
x/16 = 0
x = 0
d)
(x + 2)/7 - (1 - x)/28 = (x - 2)/14 + 2
pomnozmy obie strony przez 28
4(x + 2) - 1 + x = 2(x - 2) + 56
4x + 8 - 1 + x = 2x - 4 + 56
5x + 7 = 2x + 52
na lewa strone przenosimy wyrazenia z x, na prawa bez
5x - 2x = 52 - 7
3x = 45
x = 15
e)
11 + (x + 2)/3 = -(-x + 1)/9 -15
pomnozmy obie strony przez 9
99 + 3(x + 2) = x - 1 - 135
99 + 3x + 6 = x - 136
3x - x = -136 - 99 - 6
2x = -136 - 93
2x = -229
x = -114,5