Question

Решите уравнения:1)-6(х+2)=4х-172)(18х-19)-(4-7х)=-733)10х+3(7-2х)=13+2х4)-3(4-5у)+2(3-6у)=-3,9

Answer 1

1)-6х-4х=-17+12
-8х=-5
х=5/8
х=0.625
2) 25х=23-73
25х=-50
х=-50/25
х=-2
3)4х+21=13+2х
2х=13-21
Х=-8/2
х=-4
4)-12+15у+6-12у=-3.9
3у=6-3.9
у=2.1/3
у=0.7

Answer 2

1) -6(x+2) = 4x - 17 -6x - 12 = 4x - 17 -6x - 4x = -17 + 12 -10x = -5 x = -5 / -10 x = 1/2

2) (18x - 19) - (4 - 7x) = -73 18x - 19 - 4 + 7x = -73 25x - 23 = -73 25x = -73 + 23 25x = -50 x = -50 / 25 x = -2

3) 10x + 3(7 - 2x) = 13 + 2x 10x + 21 - 6x = 13 + 2x 4x + 21 = 13 + 2x 4x - 2x = 13 - 21 2x = -8 x = -8 / 2 x = -4

4) -3(4 - 5y) + 2(3 - 6y) = -3.9 -12 + 15y + 6 - 12y = -3.9 -12 + 6 + 15y - 12y = -3.9 -6 + 3y = -3.9 3y = -3.9 + 6 3y = 2.1 y = 2.1 / 3 y = 0.7