Question

alguém pode mim falar a resposta dessa equação 9x-23=13x-27 e essa outra, 0,8+2x=x+3,5

Answer 1

$9x-23=13x-27\to \\\\ 9x-13x=-27+23\to \\\\ -4x=-4(-1)\to \\\\ 4x=4\to \\\\ x= \frac{4}{4} \to \\\\ x=1$



$0,8+2x=x+3,5\to \\\\ 2x-x=3,5-0,8\to \\\\ x=2,7$

Answer 2

a)

9x - 23 = 13x - 27
- 23 + 27 = 13x - 9x
4 = 4x
4x = 4
x = 4/4
x = 1

b)

0,8 + 2x = x + 3,5
2x - x = 3,5 - 0,8
x = 2,7