Question

a) 5x-7=-27
b) 6-4x=18
c) 1-x=2x-10
d) -(-3+7x)+1=-10
e) |2x-5|=6
f) 2-|x+3|=-14
dau coroana daca se răspunde repede✌✌​

Answer 1

Salut! :)

a) 5x - 7 = -27
5x = -27 + 7
5x = -20 | :5
x = -4

b) 6 - 4x = 18
4x = 18 - 6
4x = 12 | :4
x = 3

c) 1 - x = 2x - 10
x - 2x = -10 - 1
-x = -11 | * (-1)
x = 11

d) -(-3+7x)+1=-10
3-7x+1 = -10
3-7x = -10-1
3-7x= -11
7x= -11-3
7x = 14 | :7
x = 2

e) |2x-5|=6 => 2x-5= +-6
2x - 5 = 6
2x = 6+5
2x = 11 | : 2
x = 11/2

2x - 5 = -6
2x = -6+5
2x = -1 | :2
x = -1/2

f) 2-|x+3|=-14 | - 2
|x+3| = -16 => x+3 = +-16
x+3=16
x = 16 - 3
x = 13

x+3= -16
x = -16-3
x= -19