Question

2.
Rezolvaţi ecuatiile:
a) 3(4+2. x) = 42
b) (23 - x):6 = 3
c) 5.(3.x-9) = 60
d) (23-5.x):9=2
e) 24:(5 – x) = 6
f 32:(13-5. x) = 4
g) 3-x-15:3=19+3​

Answer 1

Răspuns:

a) 3(4+2x)=42

42:3=14

(4+2x)=14

14-4=10

2x=10

x=10:2

x=5

b) (23-x):6=3

3.6=18

(23-x)=18

x=23-18

x=5

c)5(3x-9)=60

5.60=300

3x=300+9

3x=309

x=309:3

x=103

d) (23-5x):9=2

(23-5x)=9.2=18

5x=23-18

5x=5

x=5:5

x=1

e) 24:(5 – x) = 6

144:(5-x)

144:

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Answer 2

a)4+2x=14
2x=10
X=5
b)23-x=18
-x=-5
X=5
c)3x-9=12
3x=21
X=7
d)23-5x=18
-5x=-5
X=1
e)5-x=144
X=-139
f)13-5x=128
-5x=115
X=-23
g)3-x-5=21
-x-2=21
x=-23