Question

sendo U=Q resolva as seguintes equações do 1 grau com uma incógnitaa)7x+1-5x=9b)y+9y+5=-15c)17x-1=15x+3d)16-x=x+25e)20x-13=20+9xf)21x+1=11x+6g)9x-23=13x-27h)0,8+2x=x+3,5i)3,5x+1=3,1x+3j)5-x-22=4x-11-6x

Answer 1

A) 7x+1-5x=9
7x-5x=9-1
2x=8
X=8:2
x=4

B)y+9y+5=-15
Y+9y=-15+5
10y=-10
y=-10:10
y=1

C) 17x-1=15x+3
17x-15x=3+1
2x=4
x=4:2
x=2

D) 16-x=x+25
-x-x=25-16
-2x=9(-1)
2x=9
x=9:2
x=4,5

E) 20x-13=20+9x
20x-9x=20+13
11x=33
x=33:11
x=3

F) 21x+1=11x+6
21x-11x=6-1
10x=5
x=5:10
x=0,5

G)9x-23=13x-27
9x-13x=23-27
-4x=-4.(-1)
4x=4
x=4:4
x=1

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

I) 3,5x+1=3,1x+3
3,5x-3,1x=3-1
0,4x=2
x=2:0,4
x=5

J) 5-x-22=4x-11-6x
x-4x+6x=-11-5+22
3x=6
x=6:3
x=3

Bons Estudos
Espero ter ajudado