Question

Me ajudem♡☆¿
Arme e resolva as equações:

1)4(x+3)=1
2)3 (x-2)=2x-4
3)3(x-1)-7=15
4)7(x-4)=2x-3
5)3(3x-1)=4(3-x)
6)3(3x-1)=2(3x+2)
7)7(x-2)=5(x+3)
8)3(2x-1)=-2(x+3)
9)5x-3(x+2)=15
10)2x+3x+9=8(6-x)
11)4(x+10)-2(x-5)=0
12)3(2x+3)-4(x-1)=3
13)13+4(2x-1)=5(x+2) 14)4(x+5)+3(x+5)=21
15)2(x+5)-3(5-x)=10

Answer 1

a) 4.(x + 3) = 1
4x + 12 = 1
4x = 1 - 12
4x = -11
x = -11/4

b) 3.(x - 2) = 2x - 4
3x - 6 = 2x - 4
3x - 2x = 6 - 4
x = 2

c) 3.(x - 1) - 7 = 15
3x - 3 - 7 = 15
3x -10 = 15
3x = 15 + 10
3x = 25
x = 25/3

d) 7.(x - 4) = 2x - 3
7x - 28 = 2x - 3
7x - 2x = 28 - 3
5x = 25
x = 25/5
x = 5

e) 3.(3x - 1) = 4.(3 - x)
9x - 3 = 12 - 4x
9x + 4x = 12 + 3
13x = 15
x = 15/13

f) 3.(3x - 1) = 2.(3x + 2)
9x - 3 = 6x + 4
9x - 6x = 4 + 3
15x = 7
x = 7/15

g) 7.(x - 2) = 5.(x + 3)
7x - 14 = 5x + 15
7x - 5x = 15 + 14
2x = 29
x = 29/2
x = 14,5

h) 3.(2x - 1) = -2.(x + 3)
6x - 3 = -2x - 6
6x + 2x = 3 - 6
8x = -3
x = -3/8

i) 5x - 3.(x + 2) = 15
5x - 3x - 6 = 15
2x = 15 + 6
2x = 21
x = 21/2
x = 10,5

j) 2x + 3x + 9 = 8.(6 - x)
5x + 9 = 48 - 8x
5x + 8x = 48 - 9
13x = 39
x = 39/13
x = 3

k) 4.(x + 10) - 2.(x - 5) = 0
4x + 40 - 2x + 10 = 0
4x - 2x = - 40 - 10
2x = -50
x = -50/2
x = -25

l) 3.(2x + 3) - 4.(x - 1) = 3
6x + 9 - 4x + 4 = 3
6x - 4x = 3 - 4 - 9
2x = -10
x = -10/2
x = -5

m) 13 + 4.(2x - 1) = 5.(x + 2)
13 + 8x - 4 = 5x + 10
8x - 5x = 10 +4 - 13
3x = 1
x = 1/3

n) 4.(x + 5) + 3.(x + 5) = 21
4x + 20 + 3x + 15 = 21
4x + 3x = 21 - 20 - 15
x = -14

o) 2.(x + 5) - 3.(5 - x) = 10
2x + 10 - 15 + 3x = 10
2x + 3x = 10 - 10 + 15
5x = 15
x = 15/5
x = 3

Espero ter ajudado!!! Bons estudos!!!