Question

Решить данные примеры

Answer 1

130.
а) 3 (х - 2) - 5 = 4 - (5х - 1);
3x - 6 - 5 = 4 - 5x + 1;
3x-11 = 5-5x
8x = 16
x = 16 : 8
x=2

в) 7-2(3-x) = 4(x-1)+5;
7 - 6 + 2x = 4x - 4 + 5;
1+2x = 4x+1;
2x = 0
x=0

131.
a) $frac{3x+1}{5} =2- frac{4(x-3)}{15}$
3(3x+1) = 2*15 - 4(x-3)
9x+3 = 30 - 4x +12
13x = 39
x=3

в) $1- frac{x-3}{2} =x- frac{3(5-2x)}{7}$
1*14 - 7(x-3) = 14x - 2*3(5-2x)
14-7x+21 = 14x-30+12x
33x = 65
$x=1 frac{32}{33}$