решить уравнения: 1)4(0,2х-7)-5(0,3х+6)=5 2)4(3-2х)+24=2(3+2х) 3)04(х-3)=0,5(4+х)-2,5...

Question

решить уравнения: 1)4(0,2х-7)-5(0,3х+6)=5 2)4(3-2х)+24=2(3+2х) 3)04(х-3)=0,5(4+х)-2,5 4)0,5(х-3)=0,6(4+х)-2,6 5)0,3(5х-7)=3(0,2х+3,2) 6)0,9(4у-2)=0,5(3у-4)+44 7)2(0,6х+1,85)-0,7+1,3х 8)0,(5у-2)=0,3(2у-1)-0,9

Answer 1

1) 0.8X - 28 - 1.5X - 30 = 5

- 0.7X = 5 + 28 + 30

- 0.7X = 63

X = - 90

............................................

2) 12 - 8X + 24 = 6 + 4X

12X = 30

X = 2.5

......................................

3) 0.4X - 1.2 = 2 + 0.5X - 2.5

0.1X = - 1.2 - 2 + 2.5

0.1X = - 0.7

X = - 7

............................

4) 0.5X - 1.5 = 2.4 + 0.6X - 2.6

0.1X = - 1.5 - 2.4 + 2.6

0.1X = - 3.9 + 2.6

0.1X = - 1.3

X = - 13

..............................................

5) 1.5X - 2.1 = 0.6X + 9.6

0.9X = 11.7

X = 13