Poziomo:
A. x = 10
B. x = 15
D. x = 12
E. x = 145
Pionowo:
A. x = 15
B. x = 18
C. x = 225
D. x = 14
A. 3(2x + 1) = - x + 73
6x + 3 = - x + 73
7x = 70
x = 10
B. 
7(x + 1) - 2(x - 1) = 84
7x + 7 - 2x + 2 = 84
5x = 75
x = 15
D. 50 - x = 3x + 2
48 = 4x
x = 12
E. (x - 11)(x + 11) - 25 = 
- 146 = - 2x + 144
- 290 = - 2x
x = 145
A. - (2x - 1) = - 29
- 2x + 1 = - 29
- 2x = - 30
x = 15
B. 14 = 5x : 6 - 1
15 = 5x : 6
90 = 5x
x = 18
C. 7(x - 15) - (3x + 20) = 5(x - 70)
7x - 105 - 3x - 20 = 5x - 350
4x - 125 = 5x - 350
- x = - 225
x = 225
D. 7x - 4 = 5(1 : 5x + 16)
7x - 4 = x + 80
6x = 84
x = 14