Question

rezolvați:
a)3(x-5)+4=7
b) 4(x-3)=8
c) |2x-12|=0
d) 2x+5=18
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Answer 1

Răspuns:

a) 3x-15+4=7

3x-11=7

3x=18

x=6

b)4x-12=8

4x=20

x=5

c)2x-12=0

2x=12

x=6

d)2x=13

x=13/2

Answer 2

$a)3( \times - 5) + 4 = 7 \\ 3x - 15 + 4 = 7 \\ 3x = 7 + 15 - 4 \\ 3x = 22 - 4 \\ 3x = 18 \\ x =$

$b)4( \times - 3) + 4 = 7 \\ 4x - 12 + 4 = 7 \\ 4x = 7 + 12 - 4 \\ 4x = 19 - 4 \\ 4x = 15 \\ x = \frac{15}{4}$

$c) |2x - 12| = 0 \\ 2x = 12 \\ x = 6$

$d)2x + 5 = 18 \\ 2x = 18 - 5 \\ 2x = 13 \\ x = \frac{13}{2}$