Question

Quanto é a)4x+13=9-6x b)12x-9=3x-12
C)3x+4(x+2)=2x+9
D)2(x-6)+7x=5-3 (x-2) e)-(9-x) f) -7(-7x-5)

Answer 1

a) 4x+13=9-6x
10x=-4
x=-4/10

b) 12x-9=3x-12
9x=3
x=3/9
x=1/3

c) 3x+4(x+2)=2x+9
3x+4x+8=2x+9
5x=1
x= 1/5

d) 2(x-6)+7x=5-3(x-2)
2x-12+7x=5-3x+6
12x=11
x=11/12

e) -(9-x)
-9+x

f) -7(-7x-5)
49x+35