Question

Encontre o valor incógnita x em cada uma das equações a seguir:
A) 12x+13=27x+11
B) 5(x+3)+2(x1)=3(x-5)+2(x+2)
C) 2(x-1)+3(x+4)=(2+x)​

Answer 1

Resposta:

A) 12x+13=27x+11

$12x+13-27x-11=0\\-15x+2=0\\-15x=-2 .(-1)\\15x=2\\\\x=\frac{2}{15}$

B) 5(x+3)+2(x1)=3(x-5)+2(x+2)

$5x+15+2x+2=3x-15+2x+4\\7x+17-3x+15-2x-4=0\\2x+28=0\\2x=-28:(2)\\x=-14$

C) 2(x-1)+3(x+4)=(2+x)​

$2x-2+3x+12=2+x\\5x+10-2-x=0\\4x+8=0\\4x=-8 :(4)\\x=-2$