Question

znajdz liczby spełniające ruwnania

a) a+2,5=1,5

b) -7*x=1 1/6

c) b-2 2/3=3 2/3

d) y:3,5= -4

e) 4-c=11

f)z:1/9= -3

Answer 1

a) a+2,5=1,5

a=1,5-2,5

a=-1

b) -7*x=1 1/6

-7x=1⅙

x=7/6:(-7)=7/6·(-¹/₇)=-⅙

x=-⅙

c) b-2 2/3=3 2/3

b=3⅔+2⅔=5⁴/₃=6⅓

b=6⅓

d) y:3,5= -4

y=-4·3.5=-14

y=-14

e) 4-c=11

4-11-c

-7=c

c=-7

f)z:1/9= -3

z=-3·¹/₉=-³/₉ =-⅓

z=-⅓

Answer 2

a/. a+2,5=1,5

a= 1,5-2,5

a= -1

 

b/. -7*x = 1 i1/6

x= 1 i1/6 :7

x= 7/6 :7/1

x= 7/6*1/7 = 7/42=1/6

 

c. b - 2i2/3 = 3 i2/3

b= 3i2/3+2i2/3

b= 5 i 4/3

b = 6 i 1/3

 

d. y : 3,5 = - 4

y = -4 *3,5

y =  -14

 

e. 4-c = 11

c= 11 - 4

c = 7

 

f. z: 1/9 = -3

z= -3 * 1/9

z = -3/9

z = -1/3