calcule a raiz ou solução das seguintes equações
a) 5x+1=36
b) 7x=4x+5
c)9x-7=5x+13
d)15x-13=-39-11x
e)21+9x=15x+33
f)16-11x+12=-15x
Soluções para a tarefa
a) 5x+1 = 36
5x = 36-1
5x = 35
x = 35/5
x = 7
b) 7x = 4x+5
7x-4x = 5
3x = 5
x = 5/3
c)9x-7 = 5x+13
9x-5x = 13+7
4x = 20
x = 20/4
x = 5
d)15x-13 = -39-11x
15x+11x = -39+13
3x = -26
x = -26/3
e)21+9x = 15x+33
9x-15x = 33-21
-6x = 12
x = -12/6
x = -2
f)16-11x+12 = -15x
-11x+15x = -16-12
4x = -28
x = -28/4
x = 7
❤️ Boa tarde ❤️
04/08
Resposta:
A) 5x + 1 = 36 D) 15x - 13 = -39 - 11x
5X +1 -1 = 36- 1 15x +11x = -39 +13
5X=35 26x = -26
X=7 X= -26/26 ----> X=-1
b) 7x = 4x + 5 e) 21 + 9x = 15x + 33
7x-4x = 5 9x -15x = 33 - 21
3x= 5 -6x = 12
X=5/3 ----> X= 1,67 x=12/-6---> X=-2
c) 9x - 7 = 5x + 13 f) 16 - 11x + 12 = -15x
9x -5x = 13 +7 16 + 12 = -15x +11x
4x=20 28 = -4x
x= 60 / 4 ---> x= 5 x= 28 / -4 ---> X= -7
Explicação passo a passo: