Question

Resolva as equações a seguir:


a)2a-4=a+6

b)3y-8=a

c)x+6=2x-1

d)4a-20=18

Answer 1

A) 2a - a = 6 + 4

a = 10

B)

C) x - 2x = - 1 - 6

- x = -7

x = 7

D) 4a = 18 + 20

4a = 38

a = 19/2

Answer 2

A)2a-4=a+6

2a-a=6+4

a=10

B)3y-8=a

3y=a+8

y=$\frac{a}{3}$ + $\frac{8}{3}$

y=$\frac{a+8}{3}$

C)x+6=2x-1

x-2x=-1-6

-x=-7

x=7

D)4a-20=18

4a=18+20

4a=38

a=$\frac{19}{2}$