Question

resolva as equações: 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+4x=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
2x-2 = 18
2x = 18+2
2x = 20
x = 20 ÷ 2
x= 10

d) 12x-10x-4=3
2x -4 = 3
2x = 3 + 4
2x = 7
x = 7÷ 2
x = 3,5

e) -x-2x-4=11
-3x - 4 = 11
-3x = 11 + 4
-3x = 15
x = -5

f) 8x=5x+4,5
8x -5x = 4,5
3x = 4,5
x = 4,5 ÷ 3
x = 1,5


Espero ter ajudado!!