Question

a)3.x + 30 = 39

b)7.x + 40 = 89

c)10.x – 50 = 100

d)15.x – 30 = 15

e)8x – 40 = 104

f)4x – 70 = - 50​

Answer 1

Resposta:

a,3x=39-30

3x=9

x=9

3

x=3

b,7x + 40=89

7x=89-40

7x=49

x=49

7

x=7

c,10x-50=100

10x=100+50

10x=150

x=150

10

x=15

d)15.x – 30 = 15

15x=15+30

15x=45

x=45

15

x=3

e)8x – 40 = 104

8x=104+40

8x=144

x=144

8

x=18

f)4x – 70 = - 50

4x=- 50 +70

4x=130

x=130

4

x=32.5