Question

Resolva as equações 
a) 5X-10=2X=20
B) 3X+4=16 
C) 5(X+2)+2X=3(X+2)

Answer 1

a) 5x - 10=2x=20

5x-2x-10=20

3x= 20 + 10

3x = 30

x= 30/3= 10

b) 3x+4=16

3x=16-4

3x=12

x=12/3= 4

c) 5(x+2)+2x=3(x+2)

5x+10+2x=3x+6

7x=3x+6-10

7x-3x=-16

4x=-16

x= -16/4 = -4