Question

resolva equação do 1 °grau.

a) 2x=20

b)2x+25=5-4

c)2x-3=5x+9

d)20-2x+50=60-4x​

Answer 1

Resposta:

a) 2×=20

×=20/2

×=10

b)2×+25=5-4

2×=-24

×=-24/2

×=-12

c)2×-3=5×+9

-3×=12

×=12/-3

×=-4

d)20-2×+50=60-4×

10=-2×

×=10/-2

×=-5

Answer 2

A) 2x=20

x=20/2

x= 10

B) 2x+25=5-4

2x= 5-4-25

2x= -24

x= -24/2

x= -12

C) 2x-3=5x+9

2x-5x=9+3

-3x=12 .(-1)

X= -12/3

x = -4

D) 20-2x+50=60-4x

-2x+4x= 60-20-50

2x= -10

x= -10/2

x= -5