Question

•Rezolvati in multimea numerelor intregi urmatoarele ecuatii:
a) |x| = 7
b) |-x| = |-5|
c) |x + 1| = 3
d) |x - 2| = 3
e) |-x + 3| = 7
f) |-2x| + 1 = 15
g) |2x - 3| = 11
h) |-2x + 2| - 4 = 16
i) 14 - |- x + 4| = 8​

Answer 1

a) x={-7, 7}

b) x={-5, 5}

c) x+1={-3, 3}

x={-4, 2}

d) x-2={-3, 3}

x= {-1, 5}

e) -x+3= 3-x= {-7, 7}

x= {-4, 10}

f) |-2x| = 14

|-x| = 7

x= {-7, 7}

g) 2x-3={-11, 11}

2x= {-8, 14}

x= { -4, 7}

h) 2|-x+1|=20

|1-x|=10

1-x = {-10, 10}

x= {11, -9}

i) |-x+4|=6

4-x = {-6,6}

x= { 10, -2}

succes!