Nicoletasirbu87ask
a fost răspuns

rezolvati in z ecuatiile:
a. 2x+5=×+6
b. 2×+12=×-6
c. 3×-1=×+9
d. 4×+9=3×+17
e.2×-5=-×+7
f. 4×-12=×-6
g. 2×+9=7+×
h. 4-3×=×+12
i. -×+7=×+21
j. 3-2×=-×+6
k. 6+3×=-54+×
l. 1+9×=-89-×​

Răspuns :

Iulia23072005ow6eaeask

a) 2x - x = 5 - 6

x = - 1

b) 2x - x = 12 + 6

x = 18

c) 3x - x = - 1 - 9

2x = - 10 / : 2

x = - 5

d) 4x - 3x = 9 - 17

x = - 8

e) 2x + x = - 5 - 7

3x = - 12 / : 3

x = - 4

f) 4x - x = - 12 + 6

3x = - 6 / : 3

x = - 2

g) 2x - x = 9 - 7

x = 2

h) - 3x - x = 4 - 12

- 4x = - 8 / : ( - 4 )

x = 2

i) - x - x = 7 - 21

- 2x = - 14 / : ( - 2 )

x = 7

j) - 2x + x = 3 - 6

- x = - 3 => x = 3

k) 3x - x = 6 + 54

2x = 60 / : 2

x = 30

l) 9x + x = 1 + 89

10x = 90 / : 10

x = 9

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