Question

Gente me ajudem
a)4x+9=15+x

b)-2x-21=x+60

c)15x+19-2x=+3x+199

Answer 1

a) 4x-x=15-9
3x=6
x=6/3
x=2
b) 2x+x=-21-60
3x=-81
x=-81/3
x=-27
c) 15x-2x-3x=199-19
10x=180
x=180/10
x=18