Question

Rezolvati ecuatiile   305 + x = 607      2 de inmultit cu x=68       465-x=109     x:15=420 8a-9=15     (3x -11 ):2+12=20     3de inmultit (2x - 1) + 32=77

Answer 1

305 + x = 607
x = 607 - 305
x = 302
2 * x = 68
x = 68 : 2
x = 34
465 - x = 109
- x = 109 - 645
x = 536
x : 15 = 420
x = 420 * 15
x = 6300
8a - 9 = 15
8a = 15 + 9
a = 24 : 8
a = 3
(3x - 11) : 2 + 12 = 20
(3x - 11) : 2 = 20 - 12
3x - 11 = 8 * 2
3x = 16 + 11
x = 27 : 3
x = 9
3 * (2x - 1) + 32 = 77
6x - 3 + 32 = 77
6x = 77 - 29x = 48 : 6
x = 8