Question

Решите уравнение:
А)2x+7=5x б)3x-23=19-4x в)1,3x+4,8=2,9x-7,2
Г)2(x-3)-4(x+1)=5x-38

Answer 1

А) 2x+7=5x

2x-5x=-7

-3x=-7

x=7/3

Б)

$3x - 23 = 19 - 4x \\ 3x + 4x = 19 + 23 \\ 7x = 42 \\ x = 6$

В)

$1.3x + 4.8 = 2.9x - 7.2 \\ 1.3x - 2.9x = - 7.2 - 4.8 \\ - 1.6x = - 12 \\ x = 7.5$

Г)

$2(x - 3) - 4(x + 1) = 5x - 38 \\ 2x - 6 - 4x - 4 - 5x + 38 = 0 \\ - 7x + 28 = 0 \\ - 7x = - 28 \\ x = 4$