Question

resolva as equaçoes
a)4(X+1)=12

B)5(3-X)-4X=18

c)9X-3(2X+2)=15

d)2,5(X-2)-1,5X=1

e)3,5X+8=(X+7)

f)6(3X+2)-8=-2

g)-3(X-5)-2(2X+1)=-8

Answer 1

Oi Vitoria !

Vamos resolver !

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

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

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

d)
2,5(X-2)-1,5X=1
2,5x -5 - 1,5x = 1
x -5 = 1
x = 1+ 5
x = 6

e)
3,5X+8=(X+7)
3,5x -x = 7-8
2,5x = -1
x = -1/2,5
x = -0,4

f)
6(3X+2)-8=-2
18x + 12 -8 = -2
18x + 4 = -2
18x = -2-4
18x = -6
x = -6/18
x = -1/3

g)
-3(X-5)-2(2X+1)=-8
-3x + 15 -4x -2 = -8
-7x + 13 = -8
-7x = -8-13
-7x = -21
x = -21/-7
x = 3