Equações : a)x/2-x/4=1/2 b)x/4+7=x/2+5 c)x/3+4=2x como faço?
Soluções para a tarefa
Respondido por
3
x x 1
--- - --- = ---
2 4 2 mmc = 4
2x x 2
--- - --- = ---
4 4 4 simplificando os denominadores
2x - x = 2
x = 2
======================================================
x 7 x 5
--- + --- = --- + ---
4 1 2 1 mmc= 4
x 28 4x 20
--- + --- = ----- + ---
4 4 4 4 Simplificando os denominadores
x + 28 = 4x + 20
x - 4x = 20 - 28
- 3x = - 8 .(-1)
3x = 8
x = 8/3
==============================================
x 4 2x
--- + ---- = ----
3 1 1 mmc = 3
x 12 6x
----- + --- = -----
3 3 3 Simplificando os denominadores
x + 12 = 6x
x - 6x = - 12
- 5x = - 12 .(- 1)
5x = 12
x = 12/5
--- - --- = ---
2 4 2 mmc = 4
2x x 2
--- - --- = ---
4 4 4 simplificando os denominadores
2x - x = 2
x = 2
======================================================
x 7 x 5
--- + --- = --- + ---
4 1 2 1 mmc= 4
x 28 4x 20
--- + --- = ----- + ---
4 4 4 4 Simplificando os denominadores
x + 28 = 4x + 20
x - 4x = 20 - 28
- 3x = - 8 .(-1)
3x = 8
x = 8/3
==============================================
x 4 2x
--- + ---- = ----
3 1 1 mmc = 3
x 12 6x
----- + --- = -----
3 3 3 Simplificando os denominadores
x + 12 = 6x
x - 6x = - 12
- 5x = - 12 .(- 1)
5x = 12
x = 12/5
biaavmorais:
muito obrigada!!
Perguntas interessantes