Question

me ajuda por favor ☝️☝️☝️​

Answer 1

Explicação passo-a-passo:

7 - A) x= 9+3

X = 12

B) 4x + 2x = 1+9

6x = 9

X = 9/6 ³ = 3/4

C) x + 4x = 20 - 5

5x = 15

X = 15/5

X = 3

D) - 20x + 40x = 100

20x = 100

X = 100 / 20

X = 5

10) a) - 1/5

B) - 3/2- 5/3=

- 9/6 - 10/6=

19/6

C) - 35/ 20 = 7/4

,

D) 2/3 : 5/2= 2/3 × 2/5=4/15