Question

resolva as equações
a) 2 (x - 2) - 7 = 16

b) 7 (x - 2) = 5 ( x + 3)

c) 2 ( x - 6) = - 3 ( 5 + x )

Answer 1

a) 2 (x - 2) - 7 = 16
2x - 4 -7 =16
2x - 11 = 16
2x= 16 +11
2x= 27
x= 27/2

b) 7 (x - 2) = 5 ( x + 3)
7x - 14 = 5x + 15
7x -5x = 15 +14
2x= 29
x= 29/2

c) 2 ( x - 6) = - 3 ( 5 + x )
2x - 12 = -15 -3x
2x +3x = -15 +12
5x= -3
x= -3/5

Answer 2

a) 2 ( x - 2) - 7 = 16
2x - 4 - 7 = 16
2x = 16 + 4 + 7
2x = 27
x = 27/2
b) 7 ( x - 2) = 5 ( x + 3)
7x - 14 = 5x + 15
7x - 5 x = 15 + 14
2x = 29
x = 29/2
c) 2( x - 6) = - 3( 5 + x)
2x - 12 = - 15 - 3x
2x + 3x = - 15 + 12
5x = - 3
x = - 3/5