1) Resolva as equações a seguir
A) 5X -25 = 2X + 2
B) 5(X-2) = 3X +20
C) 3(2X-5) = -4X + 15
D) 23 - 2X = -3X + 25
E) 25X + 30 = 10X +45
F) X/5 = 30
G) 8X -X = 45 -10
Respostas
respondido por:
1
A) 5X-2X = 2+25
3X = 27
X = 27/3
X = 9
B) 5X-10 = 3X+20
-5X-3X = 20-10
-8X = 10 (.-1)
X = 10/8
C) 6X-15 = -4X+15
6X+4X = 15+15
10X = 30
X = 30/10
X = 3
D) 23-25=-3X+2X
-2 = -1X (.-1)
2 = 1X
X = 2/1
X = 1
E) 25X-10X = 45-30
15X = 15
X = 15/15
X = 1
F) X = 150
G) 7X = 15
X = 15/7
3X = 27
X = 27/3
X = 9
B) 5X-10 = 3X+20
-5X-3X = 20-10
-8X = 10 (.-1)
X = 10/8
C) 6X-15 = -4X+15
6X+4X = 15+15
10X = 30
X = 30/10
X = 3
D) 23-25=-3X+2X
-2 = -1X (.-1)
2 = 1X
X = 2/1
X = 1
E) 25X-10X = 45-30
15X = 15
X = 15/15
X = 1
F) X = 150
G) 7X = 15
X = 15/7
respondido por:
2
a)5x-2x=2+25
3x=27
x=27/3=9
b)5x-10=3x+20
5x-3x=20+10
2x=30
x=30/2=15
c)6x-15=-4x+15
6x+4x=15+15
10x=30
x=30/10=3
d)23-2x=-3x+25
-2x+3x=25-23
x=2
e)25x+30=10x+45
25x-10x=45-30
15x=15
x=15/15=1
f)7x=35
x=35/7=5
g)x=30.5=150
Perguntas similares
7 anos atrás
7 anos atrás
9 anos atrás
9 anos atrás
9 anos atrás