Question

alguém me ajuda por favor
obs:preciso da conta

Answer 1

a) 2x + 5 = 13
2x = 13 - 5
2x = 12
x = 12 : 2
x = 6

b) 4x - 12 = x
4x - x = +12
3x = 12
x = 12 : 3
x = 4

c) 11x - 11 = x - 11
11x - x = - 11 + 11
12x = 0
x = 0

d) 10 + (x - 2) = 5 - ( x - 4)
10 + x - 2 = 5 - x + 4
+x + x = +4 + 5 + 2 - 10
2x = 2
x = 1

e) 6x - 4 ( x + 5) = ( 5 - 3x)
6x - 4x + 20 = 5 - 3x
6x - 4x + 3x = 5 - 20
5x = 15
x = 3
g
f) 2( x - 2) + 3(2x + 2) = -5( 2 - x)
2x - 4 + 6x + 6 = - 10 + 5x
2x + 6x + 5x = -10 - 6 + 4
13x = - 12
x = 12\ 13