A) 4× +2=38
B) 9× =6× 12
C) 5×- 1=3× +11
D) 2×+8 =×+13
E) 5×-23=×-1
Soluções para a tarefa
Resposta:
A) x = 9
B) x = 4
C) x = 6
D) x = 5
E) x = 5,5 ou 11/2
Explicação passo-a-passo:
A) 4x + 2 = 38
4x = 38 -2
4x = 36
x = 36/4
x = 9
B) 9x =6x +12
9x - 6x = 12
3x = 12
x = 12/3
x = 4
C)5x- 1=3x +11
5x - 3x = 11 + 1
2x = 12
x = 12/2
x = 6
D) 2x+8 =x+13
2x - x = 13 - 8
x = 5
E) 5x-23=x-1
5x - x = -1 + 23
4x = 22
x = 22/4
x = 5,5 ou 11/2
Resposta:
A) X=9 B) X=4 D) X=5 E) X=5,5
Explicação passo-a-passo:
A) 4× +2=38
4x+2-2=38-2
4x=36
4x/4=36/4
x=36/4
x= 9
B) 9× =6× 12
9x-6x=6x-6x+12
9x-6=12
3x=12
3x/3=12/3
x=12/3
x=4
C) 5×- 1=3× +11
5x-1+1=3x+11+1
5x=3x+12
5x-3x=3x-3x+12
2x= 12
2x/2=12/2
x=12/2
x=6
D) 2×+8 =×+13
2x+8-8=x+13-8
2x=x+5
2x-x=x-x+5
x=5
E) 5×-23=×-1
5x-23+23=x-1+23
5x=x+22
5x-x=x-x+22
4x=22
4x/4=22/4
x=22/4
X= 5,5