Rezolvati urmatoarele ecuatii: a) 7x=56
b)13-2x=5
c)3x+5=20
d)50-4x=11-5
e)4(x-9)=4
f)6(x+1)-10=29-3
g)5(x+3)=27+23
h) 3x+3+2(x+5)=23
i)7x+3(x+2)=16
j)11+14=3(x-1)+16
k)13(x-2)-2x=7
l) (x+4 200)÷80=81 Va rog ajutati-ma

1

Răspunsuri

2014-10-07T21:58:46+03:00
A)7x=56
x=8

b)13-2x=5
-2x=-8
x=4

c)3x+5=20
3x=15
x=5

d)50-4x=11-5
-4x=6-50
-4x=-44
x=11

e)4(x-9)=4
4x-36=4
4x=40
x=10

f)6(x+1)-10=29-3
6x+6-10=26
6x=30
x=5

g)5(x+3)=27+23
5x+15=50
5x=35
x=7

h)3x+3+2(x+5)=23
3x+3+2x+10=23
5x+13=23
5x=10
x=2

i)7x+3(x+2)=16
7x+3x+6=16
10x=10
x=1

j)11+14=3(x-1)+16
25=3x-3+16
25=3x+13
-3x=13-25
-3x=-12
x=4

k)13(x-2)-2x=7
13x-26-2x=7
11x=33
x=3

l)(x+4200):80=81
x+4200=81*80
x+4200=6480
x=2280
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