1) Résoudre les équations. a) 37 + x = 15 b) -6/5 = y - 11/5 c) 13 - a = -52 d) 7/2 = - b - 5/4 e) 4x = 36 f) 3y = -21 g) 18 = -4a h) 4/5m = 2/3 i) 6 x = -27 j)

a) 37+x=15

x=15-37

x=-22

b)-6/5=y-11/5

-y=-11/5+6/5

y=5/5=1

c)13-a=-52

a=-52-13

a=-65

d)7/2=-b-5/4

b=-5/4+7/2

b=9/4

e)4x=36

x=36/4=9

f)3y=-21

y=-21/3=7

g)18=-4a

18/-4=a

a=-9/2

h)4/5m=2/3

m=(2/3)/(4/5)

m=5/6

i)6x=-27

x=-27/6

x=-9/2

j)-15=-20y

-15/-20=y

3/4=y

k)-2/3t=-3/2

t=(-3/2)/(-2/3)

t=9/4

l)1+2/3=-4a

5/3=-4a

(5/3)/-4=a

-5/12=a

a) 37+x=15

x=15-37

x=-22

b)-6/5=y-11/5

-y=-11/5+6/5

y=5/5=1

c)13-a=-52

a=-52-13

a=-65

d)7/2=-b-5/4

b=-5/4+7/2

b=9/4

e)4x=36

x=36/4=9

f)3y=-21

y=-21/3=7

g)18=-4a

18/-4=a

a=-9/2

h)4/5m=2/3

m=(2/3)/(4/5)

m=5/6

i)6x=-27

x=-27/6

x=-9/2

j)-15=-20y

-15/-20=y

3/4=y

k)-2/3t=-3/2

t=(-3/2)/(-2/3)

t=9/4

l)1+2/3=-4a

5/3=-4a

(5/3)/-4=a

-5/12=a