Question

СРОЧНО РЕШИТЕ ПЛИЗ!!!!!!
1) 4 (x-6)=x-9
2) 6-3(x+1)=7-x
3) (8x+3)-(10x+6)=9
4) 2,8-x=8(x+2,8)
5) 0,3(6-3y)=4,5-0,8(y-9)
6) 5/6(1/2x-2/3)=3x-2 1/4

Answer 1

1) 4(x-6)=x-9
4x-24=x-9
3x=15
x=5

2) 6-3(x+1)=7-x
6-3x-3=7-x
3-3x=7-x
2x=-4
x=-2

3)(8x+3)-(10x+6)=9
8x+3-10x-6=9
-2x=12
x=-6

4) 2,8-x=8(x+2,8)
2,8-x=8x+22,4
-19,6=9x
x=-19,6/9

5) 0,3(6-3y)=4,5-0,8(y-9)
1,8-0,9y=4,5-0,8y+7,2
-0,1y=9,9
0,1y=-9,9
y=99

$frac{5}{6} ( frac{1}{2} x - frac{2}{3} ) = 3x - 2 times frac{1}{4} \ frac{5}{12} x - frac{10}{18} = 3x - frac{9}{4} \ frac{5}{12} x - 3x = - frac{9}{4} + frac{10}{18} \ frac{5}{12} x - frac{36}{12} x = - frac{81}{36} + frac{20}{36} \ - frac{31}{12} x = - frac{61}{36} \ frac{31}{12} x = frac{61}{36} \ 93x = 61 \ x = frac{61}{93}$