Question

alguem me ajuda
a)4b-3=1+8b
b) 9x+105-10x=117-13x
c) 13+7x=2x+8

Answer 1

a)4b-3=1+8b
-1 -3 = +8b - 4b
4b = -4
b= -4/4
b = -1

b) 9x+105-10x=117-13x
-x + 105 = 117 - 13x
13x - x = 117 - 105
12x = 12
x= 12/12
x = 1


c) 13+7x=2x+8
7x - 2x = 8 - 13
5x = -5
x= -5/5
x= -1

Bons estudos! :)