Question

me ajudem URGENTE

RESOLVAM

A) 4 (×+1)=12
B)5 (3-×)-4×=18
C)9×-3 (2×+2)=15
D)6 (3×+2)-8-2

Answer 1

a)
4 (x+1) = 12
4 x + 4 = 12
4 x + 4 -12 = 0
4 x - 8 = 0
4 x = 8
x = 8 / 4
x = 2

b)
5 (3 - x) - 4 x = 18
15 - 5 x - 4 x = 18
15 - 9 x = 18
- 9 x + 15 - 18 = 0
- 9 x - 3 = 0
- 9 x = 3
 x = 3 / - 9
x = - 1 / 3

c)
9 x - 3 (2 x + 2) = 15
9 x - 6 x - 6 = 15
3 x - 6 = 15
3 x - 6 - 15 = 0
3 x - 21 = 0
3 x = 21
x = 21 / 3
x = 7

d)
6 (3 x + 2) - 8 - 2 = 0
18 x + 12 - 10 = 0
18 x + 2 = 0
18 x = -2
x = -2 / 18
x = - 1 / 9



espero ter ajudado