Resolva a equação a seguir: 6x + 21 + 2x – 8 + 3x = 4x – 10 – x + 5 + 5x + x + 2855 + 21 – 8 = 45 + 23 * x = 5 x = 10 x = 15 x = 20 x = 25
Soluções para a tarefa
Resposta:A)
6x = 2x + 16
6x - 2x = 16
4x = 16
x = 16/4
x = 4
B)
2x-5=x+1
2x - x = 1 + 5
x = 6
C)
2x+3=x+4
2x - x = 4 - 3
x = 1
D)
5x+7=4x+10
5x - 4x = 10 - 7
x = 3
E)
4x-10=2x+2
4x - 2x = 2 + 10
2x = 12
x = 12/2
x = 6
F)
4x-7=8x-2
4x - 8x = -2 + 7
-4x = 5 .(-1)
4x = -5
x = -5/4
G)
2x+1=4x-7
2x - 4x = -7 - 1
-2x = -8 .(-1)
2x = 8
x = 8/2
x = 4
H)
9x+9+3x=15
9x + 3x = 15 - 9
12x = 6
x = 6/12
x = 3/6
x = 1/3
I)
16x-1=12x+3
16x - 12x = 3 + 1
4x = 4
x = 4/4
x = 1
J)
3x-2=4x+9
3x - 4x = 9 + 2
-x = 11 .(-1)
x = -11
K)
5x+-3+x=2x+18
5x + x - 2x = 18 + 3
6x - 2x = 21
4x = 21
x = 21/4
L)
17x+7x=x+18
24x - x = 18
23x = 18
x = 18/23
M)
x+x-4=17-2
2x = 15 + 4
2x = 19
x = 19/2
N)
x+2x+4-5x=4x-9
3x - 5x - 4x = -9 - 4
3x - 9x = - 13
-6x = -13 .(-1)
6x = 13
x = 13/6
O)
5x+6x=3x+2x-4
11x - 3x - 2x = -4
11x - 5x = -4
6x = -4
x = -4/6
x = -2/3
P)
5x+4=3x-2x+4
5x - 3x + 2x = 4 - 4
2x + 2x = 0
4x = 0
x = 0/4
x = 0
Explicação passo a passo: