Question

Resolva as equações: 1- a) 4x-6=22 , b) 9-x= 2x , c) 8+4x=6x-4 , d) 3x+1=x+9 , e) 4x-11=7-2x, f) 13x+1-10x=5+x

2 - a)4x+1=x+7 , b) 3x+3=12 , C) x+5=2x+4

Me ajudem é para amanha cedo

Answer 1

1- a) 4x-6 = 22
4x = 22+6
x = 28/4
x = 7

b) 9-x = 2x
(-x-2x = -9).(-1)
3x = 9
x = 9/3
x = 3

c) 8+4x = 6x-4
4x-6x = -4-8
(-2x = -12).(-1)
x = 12/2
x = 6

d) 3x+1 = x+9
3x-2x = 9-1
x = 8

e) 4x-11 = 7-2x
4x+2x = 11+7
6x = 18
x = 18/3
x = 6

f) 13x+1-10x = 5+x
13x-10x-x = 5-1
2x = 4
x = 4/2
x = 2

2- a) 4x+1 = x+7
4x-x = 7-1
3x = 6
x = 6/3
x = 2

b) 3x+3 = 12
3x = 12-3
x = 9/3
x = 3

c) x+5 = 2x+4
x -2x = 4-5
(-x = -1).(-1)
x = 1

Answer 2

Veja: 1) a) 4x - 6 = 22 4x = 22 + 6 4x = 28 x = 7 b) 9 - x = 2x 2x = 9 - x 2x + x = 9 3x = 9 x = 3 c) 8 + 4x = 6x - 4 6x - 4 = 8 + 4x 6x - 4x = 8 + 4 2x = 12 x = 6 d) 3x + 1 = x + 9 3x - x = 9 - 1 2x = 8 x = 4 e) 4x - 11 = 7 - 2x 4x + 2x = 7 + 11 6x = 18 x = 3 f) 13x + 1 - 10x = 5 + x 3x - x = 5 - 1 2x = 4 x = 2 2) a) 4x + 1 = x + 7 4x - x = 7 - 1 3x = 6 x = 2 b) 3x + 3 = 12 3x = 12 - 3 3x = 9 x = 3 c) x + 5 = 2x + 4 2x + 4 = x + 5 2x - x = 5 - 4 x = 1