Question

Решите уравнение:
а) 4(x+3)=5(x-2)
б) -2(x-5)+3(x-4)=4x+1

Answer 1

Объяснение:

а)

$4(x + 3) = 5(x - 2) \\ 4x + 12 = 5x - 10 \\ 4x - 5x = - 10 - 12 \\ - x = - 10 - 12 \\ - x = - 22 \\ x = 22$

б)

$- 2(x - 5) + 3(x - 4) = 4x + 1 \\ - 2x + 10 + 3x - 12 = 4x + 1 \\ x + 10 - 12 = 4x + 1 \\ x - 2 = 4x + 1 \\ x - 4x = 1 + 2 \\ - 3x = 1 + 2 \\ - 3x = 3 \div ( - 3) \\ x = - 1$