Question

Resolva as equações :

A) 5x+9= 18
B) x-1= -8
C) 3y-8= 13
D) 12x-10=5x+11
E) 7x+5 =68-2x

Answer 1

Resposta:

Explicação passo-a-passo:

A) 5x+9= 18

5x=18-9

x=9/5

------------------

B) x-1= -8

x=-8+1

x=-7

----------------

C) 3y-8= 13

3y=13+8

y=21/3

y=7

---------------

D) 12x-10=5x+11

12x-5x=11+10

7x=21

x=21/7

x=3

-----------------------

E) 7x+5 =68-2x

7x+2x=68-5

9x=63

x=63/9

x=7