Question

Como faço pra resolver esses cálculos a baixo:
B)9x-7=5+13 c)6x-12=2x+180 D)7x+1-5x=9
E)x+9x+5=15 F)17x-1=15x+3 G)20x-13=20+9x H)21x+1=11x+11 I)9x-23=13x-27
J)10x+4=16x-8 K)9x-4=6x+8 L)7x+49=3x+57

Answer 1

Resposta:

B)9x-7=5+13 => 9x = 5+13+7 => 9x = 25 => x = 25/9

c)6x-12=2x+180  => 6x - 2x = 180 + 12 => 4x = 192 => x = 192/4 => x = 48

D)7x+1-5x=9 => 7x - 5x = 9 - 1 =>2x = 8 => x = 8/2 => x = 4

E)x+9x+5=15 => x + 9x = 15 - 5 => 10x = 10 => x = 10/10 => x = 1

F)17x-1=15x+3  => 17x - 15x = 3 + 1 => 2x = 4 => x = 4/2 => x = 2

G)20x-13=20+9x  => 20x - 9x = 20 + 13 => 11x = 33 => x = 33/11 = > x = 3

H)21x+1=11x+11  => 21x - 11x = 11 - 1 => 10x = 10 => x = 10/10 => x = 1

I)9x-23=13x-27 => 9x -13x = -27 + 23 => -4x = -4 => -x = -4/4 => -x = -1 => x = 1

J)10x+4=16x-8 => 10x - 16x = -8 -4 => -6x = -12 => -x = -12/6 => -x = -2 => x = 2

K)9x-4=6x+8 => 9x - 6x = 8 + 4 => 3x = 12 => x = 12/3 => x = 4

L)7x+49=3x+57 => 7x - 3x = 57 - 49 => 4x = 8 => x = 8/4 => x= 2

Explicação passo a passo: