Решите уравнения: 1) 1/3*(4x+2)=2x-1 2) 1/2*(5x+2)=7/2(x-6) - вопрос №2814988113422121252726 от NataNati 28.08.2020 10:08

Question

Алгебра: Решите уравнения: 1) 1/3*(4x+2)=2x-1 2) 1/2*(5x+2)=7/2(x-6)

NataNati · Answer

1) 1/3 * ( 4X + 2 ) = 2X - 1
4X + 3 = 3 * ( 2X - 1 )
4X + 3 = 6X - 3
6X - 4X = 3 + 3
2X = 6
X = 6 : 2
X = 3

2) 1/2 * ( 5X + 2 ) = 7/2 * ( X - 6 )
( 5X + 2) / 2 = ( 7 * ( X - 6)) / 2
5X + 2 = 7X - 42
7X - 5X = 2 + 42
2X = 44
X = 44 : 2
X = 22