Question

valor de n)9x+9+3x=15 o)16x-1=12x+3 p)3x-2=4x+9 q)5x-3+x=2x+9 r)17x-7x=x+18 s)x+x-4=17-2x+1 t)x+2x+3-5x=4x-9 u)5x+6x-16=3x+2x-4 v)5x+4=3x-2x+4

Answer 1

n)9x+9+3x=15
9x+3x= 15-9
11x= 6
x= 6/11

o)16x-1=12x+3
16x-12x= 3 +1
4x= 4
x= 4/4
x= 1

p)3x-2=4x+9
3x-4x= 9+2
-x= 11
x= 11 / -1
x= -11

q)5x-3+x=2x+9
5x+ x-2x= 9 +3
6x-2x= 12
4x= 12
x= 12/4
x= 3

r)17x-7x=x+18
17x-7x-x= 18
17x-8x= 18
9x= 18
x= 18/9
x= 2

s)x+x-4=17-2x+1
x+x+2x= 17+1+4
2x+2x= 17+5
4x= 22
x= 22/4
x= 5,5

t)x+2x+3-5x=4x-9
x+2x-5x-4x= -9-3
3x-9x= -12
-6x= -12
x= - 12/ -6
x= 2

u)5x+6x-16=3x+2x-4
5x+6x-3x-2x= -4+16
11x -5x= 12
6x= 12
x= 12/6
x= 2

v)5x+4=3x-2x+4
5x-3x+2x= 4-4
2x+2x= 0
4x= 0
x= 0/4
x= 0

Termos semelhantes:
Termos com incógnitas (x) de um lado e termos sem incógnitas do outro lado.