3. Решите уравнения: а) 31(17+x)=2294;
б) (5x−7) · 21 =798;
в) 24x+6x−19=491;
Г) (x−23) : 26 = 7

а) 31(17+х) = 2294

17+x = 74

x = 74 - 17 = 57

x = 57

b) (5x-7)*21 = 798

105x - 147 = 798

105x = 798 + 147

105x = 945

x = 9

в) 24x+6x-19 = 491

30x - 19 = 491

30x = 491+19

30x = 510

x = 17

г) (x-23):26 = 7

x-23/26 = 7

x-23 = 182

x=182+23 = 205

x = 205