Question

1. Calcule as equações do 1º grau:
a) 9x = 6x + 12
b) 5x - 1 = 3x + 11
c) 2x + 8 = x + 13
d) 4.(x - 2) - 5,(2-3x) = 4.(2x - 6)
e) 23x - 16 = 14 - 17x
f) 10y - 5,(1 + y) = 3.(2Y - 2) - 20​

Answer 1

Resposta:

A) x=4

B) x=6

C) x=5

D) x= 6/-11 ou -0,54

E) x= 3/4

F) y= 21

Explicação passo-a-passo:

Answer 2

Resposta:

a) 9x=6x+12

9x-6x=12

3x=12

x=12/3

x=4

.

b) 5x-1=3x+11

5x-3x=11+1

2x=12

x=12/2

x=6

.

c) 2x+8=x+13

2x-x=13-8

x=5

.

d) 4(x-2)-5(2-3x) =4(2x-6)

4x-8-10+15x=8x-24

19x-18=8x-24

19x-8x=-24+18

11x=-6

x=-6/11

.

e) 23x - 16 = 14 - 17x

23x+17x=14+16

40x=30

x=30/40

x=3/4

.

f) 10y - 5,(1 + y) = 3.(2Y - 2) - 20

10y-5-5y=6y-6-20

5y-6y=-26+5

-y=-21

y=21