Question

me ajudem por favor estou precisando URGENTE

Answer 1

a
3 ( a + 3)-1 = 2
3a + 9 - 1 = 2
3a + 8 = 2
3a = 2 - 8
3a = -6
a = -63= -2 ****
b
y/3 + y/5 =10/1
mmc = 15
5y + 3y = 150
8y = 150
y = 150/8 =75/4 ****
c
( x - 5)/10 =x/3
multiplique em cruz
10x = 3 ( x - 5)
10x = 3x - 15
10x - 3x = -15
7x = -15
x = -15/7 ***
d
1/4 + [2( x - 3)]/5 = x/1 - [( x - 2)/4]
1/4 + [ 2x - 6]/5  = x/1 - [ x - 2]/4
mmc = 20
5 +  4( 2x - 6) = 20x - 5 ( x - 2) =
5 + 8x - 24 = 20x -5x + 10 =
8x - 20x + 5x + 5 - 24 - 10 =
-7x  - 29 =
7x+ 29 =
 7x = -29
x = - 29/7 ***
e
( x - 1)/10 - ( x + 5)/3 = ( x - 6)/2 + ( x + 2)/6
mmc = 60
6( x - 1)  - 20( x + 5) = 30( x - 6) + 10( x + 2) =
6x - 6 - 20x - 100 = 30x - 180 + 10x + 20 =
-14x - 106 = 40x  - 160
- 14x - 40x  = - 160 + 106 =
- 54x = - 54
54x = 54
x = 54/54 = 1 ****
f
x/5 + x/2 = 3/1
mmc = 10
2x + 5x = 30
7x = 30
x = 30/7 ****