Question

Rezolvaţi ecuațiile:
a) 4z - 6 = 194
b) 35 + 5a = 95:
c) 8b+ 26 = 58;
d) 3(2 + x) = 9
e) (15-x):3 = 5;
f) 42:(y+4)= 6
g)4z-z=24+5×12
h)8y+7y=1000:8×3​

Answer 1

a)4z-6=194

4z=196+6

4z=202

z=202:4

z=50,5

b)35+ 5a=95

5a=95-35

5a=60

a= 60:5

a=12

c)8b+26=58

8b= 58-26

8b=32

b=32:8

b=4

d)3(2+x)=9

6+3x=9

3x= 9-6

3x= 2

x= 2:3

x=0,(6)

e)(15-x):3 = 5

-x+15=5*3

-x+15=15

-x= 15:15

-x=1

x= -1

f)42:(y+4)= 6

y+4=42:6

y+4=7

y=7-4

y=3

g)4z-z=24+5×12

3z=84

z=84:3

z=28

h)8y+7y=1000:8×3

15y=375

y=375:15

y=25