Question

45x=90
35-7x=35
8x+40=-8
-x=20+x
11x+13=-9

Answer 1

Resposta:

a) x=2 b) x=10 c) x=-6 d) x=20 e) x=0,36

Explicação passo-a-passo:

45x=90

x=90/45

x=2

35-7x=35

7x=35+35

7x=70

x=70/7

x= 10

8x+40=-8

8x=-8-40

8x=-48

x=-48/8

x=-6

-x=20+x

-x-x=20

-x=20

x=-20

11x+13=-9

11x=-9+13

11x=4

x=4/11

x=0,36