Question

Resolva as equações:
A) a-5/2 = 2
B) 3(x -4) + 8 = 5
C) 11 = 36 - 5(1 - x)
D) -23 = 7 - 6(x - 10)

Answer 1

A) a-5/2 = 2 
a-5= 2.2
a=4+4 = 8

B) 3(x -4) + 8 = 5
3x-12=5-8
3x=-3+12 
x= 9/3 = 3

C) 11 = 36 - 5(1 - x) 
11-36=-5+5x
-25+5=5x
x = -20/5 = 4

D) -23 = 7 - 6(x - 10)
-23-7= -6x +60
6x= 60+ 30
x = 90/6 = 15

Answer 2

A) a-5/2=2 ---> a= 2 + 5/2 logo a = 9/2 = 4,5

B) 3(x-4)+8=5 ---> 3x-12+8=5 ----> 3x-4=5 ---> 3x=9 logo  X=3

C) 11=36-5(1-x) ----> 11=36-5+5x ---> 11=31+5x --> -20=5x logo X=-4

D) -23=7-6(x-10) ---> -23=7-6x+60 --> -30=-6x+60 --> -6x=-90 logo X=15

Espero ter ajudado.