bonjour pouvez vous m'aidé svp Merci d'avance !!​

Bonjour,

a)

5x = 2-3

5x= -1

x= -1/5

b)

2y = 15+5

2y = 20

y= 20/2 = 10

c)

3x = -2-13

3x = -15

x= -15/3 = -5

d)

-8-13 = 7x

-21= 7x

x= -21/7 = -3

e)

4t = -7+6

4t = -1

t= -1/4  =-0,25

f)

42+7 = 2x

49 = 2x

x= 49/2 =24,5

g)

3y = 4+1/2

3y = 8/2 + 1/2 = 9/2 = 4,5

y = 4,5/3 = 1,5

h)

2n = 1/10 + 2/5 = 1/10 + 4/10 = 5/10 = 0,5

n= 0,5/2 = 0,25

i)

x/2  = 5+3/2 = 10/2 + 3/2 = 13/2 = 6,5

x/2 = 6,5

x= 6,5 * 2 = 13

j)

3t/7 = 2/35 +2 = 2/35 + 70/35 = 72/35

3t = 72/35 *7 = 504/35

t= (504/35 )/3

t= 504/35 * 1/3= 504/105 = 4,8