Question

determine a solução

a)7x+1-5x= 9

b) 1y+9y+5= -15

c) 17x-1= 15x+3

d) 16-x= x+25

e) 2ox -13= 20+9x

Answer 1

a)7x+1-5x= 9
7x - 5x = 9 - 1
2x = 8
x = 8/2
x = 4

b) 1y+9y+5= -15
1y + 9y = - 15 - 5
10y = - 20
y = - 20/10
y = - 2

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 ou x = - 4,5

e) 2ox -13= 20+9x
20x - 9x = 20 + 13
11x = 33
x = 33/11
x = 3

Um abraço.