Question

3.
Resolva as equações a seguir:
a + 7 = 19
b)
2b + 6 = 21
4c + 7 = c + 15
d)
3d + 8 = 26
e)
3.2e - 2) + 8 = 7 -2.(5+e)​

Answer 1

Explicação passo-a-passo:

A) a=19-7

a=12

B) 2b+6=21

2b= 21-6

2b= 15

b=15/2

C)4x+x=15-7

5x=8

x=

$x \frac{8}{5}$

3d=26-8

3d= 18

D=6

E)3.2x-2 + 8=7-2.(5+x)

2x= 2.(5+x)+7-8+2-3

2x=10+2x+7-8+2-3

2x+2x=10+7-8+2-3

4x= 17-8+2-3

4x= 9+2-3

4x= 11-3

4x=8

x=2