Question

RESOLVA AS EQUAÇÕES: com cálculo gente!!!

a)5x+3x=16
b)x+x+8=54
c)7x-2-5x=18
d)12x-10x-4=3
e)-x-2x-4=11
f)8x=5x+4,5

Answer 1

a) 5x+3x=16
8x=16
x=16/8
x=2
b) x+x+8=54
2x+8=54
2x=54-8
2x=46
x=46/2
x=23
c) 7x-2-5x=18
7x-5x=18+2
2x=20
x=20/2
x=10
d) 12x-10x-4=3
12x-10x=3+4
2x=7
x=7/2
e) -x-2x-4=11
-x-2x=11+4
-3x=15. (-1)
3x=-15
x=-15/3
x=-5
f) 8x=5x+4,5
8x-5x=4,5
3x=4,5
x=4,5/3
x=1,5