Question

resolva as seguintes equaçoes do 1o grau
7x-5=2x
4x-10=3
11x+1=9x
x=8-2x
2x-6=-5x-20

Answer 1

7x-5=2x
7x-2x=5
5x=5
x=5/5
x=1
----------------
4x-10=3
4x=3+10
4x=13
x=13/4
----------------
11x+1=9x
11x-9x=-1
2x=-1
x= - 1/2
----------------
x=8-2x
x+2x=8
3x=8
x=8/3
----------------
2x-6=-5x-20
2x+5x=-20+6
7x=-14
x= - 14/7
x= -2
----------------
Espero ter ajudado.

Answer 2

Oi!!!
Vamos lá:
a) 7x - 5= 2x
7x - 2x= 5
5x= 5

$x= \frac{5}{5}$

x= 1
---------------------
b) 4x - 10= 3
4x= 3 + 10
4x= 13

$x= \frac{13}{4}$

x= 3,25
--------------------
c) 11x + 1= 9x
11x - 9x= -1
2x= -1

$x= \frac{-1}{2}$

x= -0,5
---------------------
d) x= 8 - 2x
x + 2x= 8
3x= 8

$x= \frac{8}{3}$
-------------------------------
e) 2x - 6= -5x - 20
2x + 5x= -20 + 6
7x= -14

$x= \frac{-14}{7}$

x= -2
Bons Estudos...