Question

Resolva as seguintes equações do 1° grau com uma incógnita
(A)x-1=9
(B)7y=5y-14
(C)2x÷5=12
(D)11x+3=7x
(E)9x+17=8x+7×

Answer 1

a=x=10
b y=-7
c x=30
d x=-4/3
E x=-17/6

Answer 2

(A)x-1=9

x= 9 + 1

x= 10

(B)7y=5y-14

7y - 5y = - 14

2y = - 14

y= - 14/2

y= - 7

(C)2x/5=12

2x = 12 • 5

2x = 60

x= 60/2

x= 30

(D)11x+3=7x

11x - 7x = - 3

4x = - 3

x= - 3/4

(E)9x+17=8x+7×

9x + 17 = 15x

9x - 15x = - 17

- 6x = - 17 (-1)

6x = 17

x= 17/6